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(Albert), (16)
(Alvan Wentworth), (4)
(Andrew Lafayette), (3)
(Anton), (1)
(Charles Christopher), (97)
(Charles Eastwick), (15)
(Charles Horton), (20)
(Charles Valentine), (19)
(Eugene Woldemar), (48)
(George Dexter), (1)
(George N.), (19)
(George Washington), (42)
(Heinrich), (25)
(Henry Nicholas), (27)
(John Gill), (27)
(John Milton), (53)
(John Strong), (15)
(Joseph Hinson), (127)
(Lucy Ann), (20)
(Samuel Bonsall), (35)
(Samuel Botsford), (14)
(Willaim St. Julian), (22)
(William Gilson), (1)
-1870 (15)
1694-1768 (22)
1699-1777 (22)
1785-1865 (1)
1796-1873 (22)
1800-1884 (22)
1802-1879 (38)
1804-1878 (53)
1805-1877 (59)
1805-1886 (1)
1806-1889 (22)
1806-1894 (13)
1807-1879 (4)
1808-1893 (15)
1809-1853 (1)
1809-1884 (712)
1809-1899 (4)
1810-1888 (65)
1811-1885 (13)
1813-1883 (16)
1813-1887 (16)
1814-1875 (108)
1817-1886 (1)
1817-1893 (1)
1818-1883 (25)
1820-1900 (15)
1820-1910 (1)
1822-1882 (75)
1822-1892 (15)
1822-1893 (26)
1822-1906? (12)
1823-1890 (97)
1824-1898 (3)
1825-1900 (20)
1825-1905 (16)
1826-1892 (126)
1826-1901 (55)
1827-1901 (22)
1828-1872 (20)
1828-1910 (55)
1829-1903 (127)
1829-1911 (16)
1829-1919 (22)
1831-1888 (1)
1831-1897 (27)
1831-1904 (33)
1831-1906 (39)
1831-1920 (23)
1832-1908 (27)
1833-1915 (5)
1833-1916 (48)
1833-1917 (20)
1834-1913 (22)
1836-1897 (1)
1838-1928 (35)
1840-1913 (42)
1841-1927 (19)
1842-1899 (24)
1842-1915 (20)
1843-1895 (19)
1843-1907 (19)
1843-1915 (60)
1843-1920 (4)
1843-1925 (42)
1844-1919 (1)
1845-1907 (4)
1846-1918 (22)
1849-1901 (22)
1849-1911 (12)
1850-1910 (1)
1859-1915 (16)
1859-1934 (24)
Abbot, Charles Conrad -- Correspondence (7)
Abbot, Henry W. -- Correspondence (7)
Academy Of Natural Sciences Of Philadelphia -- Correspondence (7)
Acorn Woodpecker (24)
Acorn Woodpecker--Behavior--California (24)
Adams, Charles F. -- Correspondence (7)
Adams, E. F. -- Correspondence (7)
Adams, William C. -- Correspondence (7)
Agaricaceae (2)
Agavaceae (63)
Agriculture (2)
AIDS (Disease) (15)
Aiken, Charles Edward Howard, 1850-1936 -- Correspondence (1)
Akutan Harbor (1)
Alameda (Calif.) (2)
Alaska (1)
Albatrosses (1)
Alberta (1)
Aleutians West (1)
Algae (50)
Alismataceae (22)
Alkaloids (4)
Allen, Charles A. -- Correspondence (2)
Allen, Francis H. (Francis Henry), 1866-1953 -- Correspondence (1)
Allen, Glover M. (Glover Morrill), 1879-1942 -- Correspondence (1)
Allen, J. A. (Joel Asaph), 1838-1921 -- Correspondence (2)
Allen, Jerome Lee (1)
Allen, Paul H., 1911-1963 (1)
Altitudes (1)
American (15)
American Museum Of Natural History China Expedition, 1916-1917 (5)
American Naturalist -- Correspondence (1)
American Ornithologists' Union -- Correspondence (7)
Amerman, Kenneth E (1)
Amerson, A. Binion (1)
Ames, C. H. -- Correspondence (10)
Ames, J. H. -- Correspondence (10)
Amherst College -- Correspondence (10)
Ammonoids (40)
Amphibians (2)
Amphibians--Guatemala. (1)
Amphibians--Habitat. (1)
Amphibians. (1)
Anacardiaceae (20)
Analysis (4)
Anatomy (1)
Andrews, Robert D. -- Correspondence (10)
Andrews, Roy Chapman, 1884-1960 (8)
Andrews Alaskan Expedition (1908) (4)
Andrews Canadian Field Trip (4)
Andros, F. W. -- Correspondence (10)
Angell And Cash -- Correspondence (10)
Angiosperms (1)
Antes, Frank T. -- Correspondence (10)
Anthony, A. W. -- Correspondence (1)
Anthropology (1)
Araceae (20)
Arceuthobium (20)
Archbold, Richard (11)
Archbold Expedition To New Guinea (1st: 1933-1934) (4)
Archbold Expedition To New Guinea (2nd: 1936-1937) (6)
Archbold Expedition To New Guinea (3rd: 1938-1939) (8)
Archbold Expedition To New Guinea (4th: 1953) (8)
Archbold Expedition To New Guinea (5th: 1956-1957) (3)
Archbold Expedition To New Guinea (6th: 1959) (4)
Archbold Expedition To New Guinea (7th: 1964) (3)
Arctic Regions -- Discovery And Exploration -- American (3)
Aristolochiaceae (22)
Armitage, William H. -- Correspondence (10)
Arnold, Edward (10)
Arnold Arboretum. Herbarium (7)
Ascherson, Paul, (22)
Ash Meadows National Wildlife Refuge (Nev.) (1)
Ashton, Peter S (10)
Asia, Central -- Discovery And Exploration (3)
Asiatic Expedition (2nd : 1918-1919) (4)
Asiatic Zoölogical Expedition (1st : 1916-1917) (3)
Asparagaceae (63)
Asteroidea (1)
Atkins, John W., Of Key West, Fla. -- Correspondence (2)
Atkins, John Wyley, 1857-1932 -- Correspondence (1)
Atkinson, Francis Parkman -- Correspondence (1)
Audubon, Maria R. (Maria Rebecca), 1843-1925 -- Correspondence (5)
Aughey, Samuel, 1831-1912 -- Correspondence (5)
Austen, Harry -- Correspondence (1)
Austin, E. P (4)
Avery, William C. -- Correspondence (1)
Babakhanlou, Parviz (1)
Babine Lake (1)
Babine Range (3)
Bailey, Charles E. -- Correspondence (5)
Bailey, Florence Merriam, 1863-1948 -- Correspondence (5)
Bailey, Harold H. (Harold Harris), 1878-1962 -- Correspondence (5)
Bailey, Harry Balch -- Correspondence (1)
Bailey, Jacob Whitman, 1811-1857 (3)
Bailey, Vernon, 1864-1942 (1)
Bailey-Wetmore Wood Collection (1)
Baird, Spencer Fullerton, 1823-1887 -- Correspondence (1)
Baja California (Mexico : Peninsula) (1)
Balch, Francis Noyes, 1873- -- Correspondence (6)
Ball, Forrest L. -- Correspondence (6)
Bangs, Edward A. -- Correspondence (6)
Bangs, Outram, 1862-1932 -- Correspondence (2)
Barbour, Thomas, 1884-1946 -- Correspondence (14)
Barghoorn, Elso S. (Elso Sterrenberg), 1915-1984 (16)
Barkley, T. M. (Theodore Mitchell), 1934- (1)
Barlow, Chester, -1902 -- Correspondence (6)
Barroeta, Gregorio Corbalan, (19)
Barrow (Alaska) (7)
Barrows, Walter Bradford, 1855-1923 -- Correspondence (6)
Bartholomew, Bruce (4)
Bartholomew, Elam, 1852-1934 (1)
Bartram, Edwin B. (Edwin Bunting), 1878-1964 (3)
Bartram, John, (22)
Bary, A. De (1)
Batchelder, Charles Foster, 1856-1954 -- Correspondence (1)
Batty, Joseph H., -1906 -- Correspondence (6)
Baxter, Samuel Sidney, 1828-1907 -- Correspondence (1)
Bear Lake (3)
Bear River Range (1)
Beatley, Janice C. (Janice Carson), 1919-1987 (1)
Beccari, Odoardo, (4)
Beck, Rollo Howard, 1870-1950 (7)
Bees--Hawaii (1)
Begonias (1)
Belemnites (1)
Bell, J. G. -- Correspondence (10)
Bendire, Charles, (1)
Bendire, Charles, 1836-1897 -- Correspondence (1)
Benjamin, William Evarts, 1859-1940 -- Correspondence (10)
Bent, Arthur Cleveland, 1866-1954 -- Correspondence (10)
Bentham, George, (22)
Bergen, Thomas D. -- Correspondence (10)
Berkeley (Calif.) (1)
Berlandier, Jean Louis, -1851 (3)
Betulaceae (22)
Bicknell, Eugene P. (Eugene Pintard), 1859-1925 -- Correspondence (1)
Bicknell, Eugene Pintard, 1859-1925 (3)
Bigelow, H. M., Mrs. -- Correspondence (10)
Bigelow, Henry Bryant, 1879-1967 -- Correspondence (2)
Bigelow, John M (53)
Bigelow, Mary C. -- Correspondence (10)
Bigelow, Robert Payne, 1863-1955 -- Correspondence (10)
Biological Specimens (1)
Biological Specimens--Identification (1)
Biology--Fieldwork (4)
Biostratigraphy (4)
Bird Banding (103)
Birds (150)
Birds--Alaska (5)
Birds--Alaska--Barrow, Point. (7)
Birds -- Arizona (1)
Birds--California (2)
Birds--California, Southern. (1)
Birds--California--Identification (1)
Birds--California--Monterey Bay Region. (1)
Birds -- California -- San Francisco Bay Area -- Identification. (1)
Birds--California--San Gabriel Mountains. (1)
Birds -- Collection And Preservation (1)
Birds--Counting (72)
Birds--Eggs (1)
Birds--Hawaii (1)
Birds--Hawaii--Oahu (2)
Birds -- Massachusetts (1)
Birds -- Nests (1)
Birds--Nevada (1)
Birds--Nevada. (2)
Birds -- New England (7)
Birds -- New Hampshire (1)
Birds--Parasites (4)
Birds--West Indies (1)
Birtwell, Francis Joseph, 1880-1901 -- Correspondence (10)
Birtwell, Olivia Morton -- Correspondence (10)
Birtwell, Rosena H. -- Correspondence (10)
Bishop, Louis B. (Louis Bennett), 1865- -- Correspondence (1)
Bishop, Watson -- Correspondence (12)
Bivalves (40)
Blanchard, Frederick, 1843-1912 -- Correspondence (12)
Blanchard, L. M. -- Correspondence (12)
Blanchard, William -- Correspondence (12)
Bloomer, Hiram G., 1821-1874 (14)
Boardman, George A. (George Augustus), 1818-1901 -- Correspondence (1)
Bolander, Henry N (27)
Bolander, Henry N. (Henry Nicholas), 1831-1897 (15)
Boles, Elizabeth O. -- Correspondence (12)
Bolles, Frank, 1856-1894 -- Correspondence (1)
Bolles, Mrs. -- Correspondence (14)
Boott, William, (1)
Boraginaceae (5)
Boston Athletic Association -- Correspondence (12)
Boston Society Of Natural History (2)
Boston Society Of Natural History -- Correspondence (12)
Botanical+illustration (50)
Botanical Art (1)
Botanical Gardens (1)
Botanical Illustration (656)
Botanical Society Of America (4)
Botanical Specimens (11)
Botanists (9)
Botany (70)
Boufford, David E (4)
Bowditch, Harold, 1883-1964 -- Correspondence (12)
Bowditch, James H. -- Correspondence (12)
Bowdoin College Labrador Expedition (1891) (1)
Bowler, E. S. -- Correspondence (12)
Bowles, John Hooper -- Correspondence (1)
Boynton, C. L. -- Correspondence (1)
Brackett, Edward A. -- Correspondence (11)
Brackett, Foster H. -- Correspondence (12)
Bradford, George Partridge, 1807-1890 -- Correspondence (12)
Bradlee, Thomas L. -- Correspondence (14)
Bradley, Leslie -- Correspondence (14)
Braislin, William C. (William Coughlin), 1865-1948 -- Correspondence (14)
Brandegee, Townshend Stith, (42)
Brasher, Reginald J. -- Correspondence (14)
Brass, L. J. (Leonard J.) (9)
Braun, Alexander, (59)
Braun, Carl -- Correspondence (14)
Breninger, George Frank, D. 1905 -- Correspondence (14)
Brett, Walter -- Correspondence (14)
Brewer, L. S., Miss -- Correspondence (14)
Brewer, T. M. (Thomas Mayo), 1814-1880 -- Correspondence (1)
Brewer, William Henry, (55)
Brewer, William Henry, 1828-1910 (14)
Brewster, Edwin Tenney, 1866-1960 -- Correspondence (14)
Brewster, Elizabeth W. -- Correspondence (14)
Brewster, John, Banker -- Correspondence (1)
Brewster, John L. -- Correspondence (14)
Brewster, R. P., Mrs. John -- Correspondence (14)
Brewster, W. T. (William Tenney), 1869-1961 -- Correspondence (14)
Brewster, William, 1851-1919 (123)
Brewster, William, 1851-1919 -- Correspondence (385)
Brewster, William, 1851-1919 -- Diaries (1)
Brewster, William, 1851-1919 -- Friends And Associates (1)
Brewster, William, 1851-1919 -- Photographs (18)
British Columbia (6)
British Museum (1)
Britton, Nathaniel Lord, (24)
Bromeliaceae (2)
Brooks, Allan, 1869-1946 (2)
Brooks, Allan, 1869-1946 -- Correspondence (2)
Brooks, William Edwin -- Correspondence (2)
Brown, Nathan Clifford, 1856-1941 -- Correspondence (1)
Bryan, E. H. (Edwin Horace), 1898-1985 (2)
Bryant, Walter Pierce -- Correspondence (1)
Bryophytes (30)
Bryozoa (11)
Buchanan, Isaac, (15)
Buchenau, Franz, (20)
Buckley, S. B (14)
Buford (1)
Bullneck Run (1)
Burt, E. A. (Edward Angus), 1859-1939 (1)
Butler, G. D (1)
Cache Creek (1)
Cactaceae (161)
Cactus (78)
Cage Birds (1)
Cahoon, John Cyrus, 1863-1891 -- Correspondence (1)
Cairns, John Simpson -- Correspondence (1)
Callitrichaceae (15)
Cambrian (3)
Camp, W. H. (Wendell Holmes), 1904-1963 (4)
Campanulaceae (1)
Canada (12)
Canby, William Marriott, (33)
Cancer (28)
Canfield, Colbert A., (20)
Cape York Expedition (1948) (9)
Carcinology (1)
Carex (4)
Caribou (2)
Carnegie Museum (1)
Carpenter, Frederick H. -- Correspondence (1)
Carter, Charles Moreland -- Correspondence (1)
Carter, Charles Morland -- Correspondence (1)
Carter, William R. (Botanist) (1)
Case, L. B (22)
Castleman Basin (9)
Catalogs (1)
Catalogs And Collections (7)
Central Asiatic Expeditions (1921-1930) (4)
Cereus (20)
Chadbourne, Arthur P. (Arthur Patterson) -- Correspondence (1)
Chamberlain, Montague, 1844-1924 -- Correspondence (1)
Chapman, A. W (4)
Chapman, Frank M. (Frank Michler), 1864-1945 -- Correspondence (2)
Characeae (2)
Charles H. Gilbert (ship) (1)
Cheever, Clarence A., 1858-1947 (1)
Chenopodiaceae (22)
Churchill County (Nev.) (1)
Clayton, Walter J. -- Correspondence (1)
Clemens, Joseph, 1862-1936 (1)
Clemens, Mary Strong, 1873-1968 (1)
Coal (9)
Collection And Preservation (2)
Collins, J. Franklin (James Franklin), 1863-1940 (1)
Collinson, Peter, (22)
Colorado (1)
Comer, George (2)
Commelinaceae (20)
Commons, Albert, (22)

Compositae (7)
Coniferae (1)
Connecticut (1)
Contra Costa County (Calif.) (2)
Convolvulaceae (90)
Cooper, J. G. (James Graham), 1830-1902 (14)
Coreopsis (2)
Correia, José G., 1881-1954 (2)
Correspondence (380)
Coues, Elliott, (24)
Coues, Elliott, 1842-1899 -- Correspondence (2)
Coultas, William F (16)
Crassulaceae (20)
Cretaceous (43)
Crocker Land Expedition (1913-1917) (30)
Cronquist, Arthur (61)
Crustacea (2)
Crustaceans (2)
Cryptogams (40)
Cupressaceae (1)
Curtis, Charles Cutler (1)
Curtis, M. A. (Moses Ashley), 1808-1872 (2)
Curtiss, Allen Hiram, (4)
Cuscuta (90)
Cyperaceae (25)
Cypripedium (1)
D. Appleton And Company -- Correspondence (10)
Dame, Lorin Low, 1838-1903 (5)
Danforth, Allen -- Correspondence (14)
Dawson, George Mercer, (22)
Deane, Walter, 1848-1930 -- Correspondence (178)
Deep Canyon (Calif.) (1)
Denton, Shelley Wright, 1859-1938 -- Correspondence (10)
Description And Travel (112)
Desert Biology--California. (3)
Desmodium (1)
Devils Hole Pupfish (2)
Devonian (11)
Diaries (1)
Diatoms (3)
Diatoms, Fossil (1)
Diffenbaugh, Elias, (15)
Discocactus (16)
Discoveries In Geography (4)
Discovery And Exploration (18)
Disocactus (15)
District Of Columbia (4)
Dodder (90)
Dodge, Carroll William, 1895-1988 (6)
Dolphins (1)
Douglas County (Nev.) (1)
Drowne, F. P (2)
Ducks (1)
Dudley, T. R. (Theodore R.), 1936- (4)
Dudley, William Russel, (12)
Dunlin (1)
Dwarf Mistletoes (20)
Eaton, A. A. (Alvah Augustus), 1865-1908 (1)
Echinocactus (38)
Echinoderms (1)
Echinodorus (22)
Echinopsis (3)
Edgemont (Moreno Valley, Calif.) (1)
Eggs (3)
Eggs--Incubation. (1)
Elgin (1)
Eliot, Charles William, 1834-1926 -- Correspondence (2)
Elk (4)
Elk Mountain (1)
Elliot, Mrs. -- Correspondence (14)
Engelmann, George, (661)
Engelmannc+Georgec (51)
England (1)
Entomology (4)
Eocene (2)
Epiphyllum (15)
Equipment And Supplies (7)
Equisetaceae (1)
Ethnology (1)
Eupatorium (5)
Euphorbia (63)
Euphorbiaceae (63)
Eyerdam, Walter J. (Walter Jakob), 1892-1974 (1)
Fagaceae (74)
Farlow, W. G (1)
Farlow, W. G. (William Gilson), 1844-1919 (27)
Farlow Reference Library And Herbarium (8)
Faxon, Charles Edward, (22)
Faxon, Walter, 1848-1920 -- Correspondence (2)
Feay, William T., (4)
Fendler, Augustus, (16)
Ferguson, William Cashman, 1861-1930 (9)
Fernald, Merritt Lyndon, 1873-1950 (3)
Fernald, Merritt Lyndon, 1873-1950 -- Travel (2)
Ferns (15)
Field Museum Of Natural History (30)
Fishes (1)
Flat Creek (2)
Fleischer, Max, 1861-1930 (1)
Fletcher, Emily Frances, 1845-1923 (1)
Foraminifera (4)
Forests And Forestry (10)
Fort Chipewyan (2)
Fort Good Hope (1)
Fort Resolution (2)
Fort Simpson (2)
Fort Smith (1)
Fossils (101)
France (Schooner) (22)
Fredholm, Adolf, 1863- (1)
French, Daniel Chester, 1850-1931 -- Correspondence (2)
Freshwater Algae (1)
Friends And Associates (1)
Fries, Elias, 1794-1878 (1)
Frigate-birds (1)
Fuertes Lorén, Miguel Domingo, 1871-1926 (1)
Fungi (61)
Fungi -- Pictorial Works (1)
Gardner, E. F. -- Correspondence (2)
Gehring, J. G. (John George), 1857-1932 -- Correspondence (1)
General Remarks On The Cactae Of Northern Yucatan (12)
Gentianaceae (12)
Geographical Distribution (1)
Geological Specimens (1)
Geological Survey (U.S.) (10)
Geological Survey Of California (15)
Geology (46)
George B. Cluett (Schooner) (2)
George B. Kelez (Ship) (2)
Geyer, Karl Andreas, (1)
Gilbert, Robert Alexander, 1870-1942 -- Correspondence (2)
Gillman, Henry, (5)
Glycosides (1)
Gobi Desert (Mongolia And China) -- Discovery And Exploration (3)
Goss, N. S. (Nathaniel S.) -- Correspondence (1)
Graf Zu, (20)
Gramineae (22)
Grand Rapids (1)
Grasses (25)
Gray, Asa, (65)
Gray, Asa, 1810-1888 (3)
Green, Fitzhugh, 1888-1947 (1)
Greene, Edward Lee, (60)
Greenland -- Description And Travel (15)
Greenland -- Languages (1)
Greenland -- Photography (1)
Greenwood, Emery C (1)
Greenwood, Emery C. -- Correspondence (1)
Grinnell, George Bird, 1849-1938 -- Correspondence (2)
Grinnell, Joseph, 1877-1939 -- Correspondence (1)
Grossulariaceae (20)
Gros Ventre (1)
Grovont (2)
Guadeloupe -- Description And Travel (1)
Guatemala (1)
Guest Books (1)
Guest Books -- Massachusetts -- Cambridge (1)
Gurney, James, (19)
Hadley, William Perry -- Correspondence (14)
Haight, E. M. -- Correspondence (14)
Hall, Elihu, (75)
Hall, Minna -- Correspondence (14)
Hamlin, Hannibal, D. 1982 (6)
Hammond, Ellen -- Correspondence (14)
Hardeman, Glen O. -- Correspondence (14)
Hardy, Charles A. -- Correspondence (14)
Hardy, J. H. (John H.) -- Correspondence (14)
Hardy, John -- Correspondence (14)
Harriman, Martha O. -- Correspondence (14)
Harrison, Miss -- Correspondence (14)
Hart, William W., Taxidermist -- Correspondence (14)
Hartert, Ernst, 1859-1933 -- Correspondence (14)
Harvard University. Botanic Garden (1)
Harvard University. Gray Herbarium (7)
Harvey, William H. (William Henry), 1811-1866 (1)
Harvie-Brown, J. A. (John Alexander), 1844-1916 -- Correspondence (1)
Hasbrouck, Edwin M. -- Correspondence (14)
Hassler Expedition (1871-1872) (1)
Hastings Natural History Reservation (Calif.) (24)
Hathaway, Harry S. -- Correspondence (1)
Hawaii (3)
Hawaiian Monk Seal (3)
Hawes, C. Alger -- Correspondence (14)
Hay-fever Plants (2)
Hay-fever Plants -- New England (2)
Hayward, Roland -- Correspondence (14)
Hazelton (1)
Heckman, J. R., Mrs. -- Correspondence (10)
Hecos, D. T. -- Correspondence (10)
Hedges, Charles F. -- Correspondence (10)
Heim, William -- Correspondence (10)
Heimstreet, T. B. -- Correspondence (10)
Heller, Edmund, 1875-1939 (2)
Heller, Edmund, 1875-1939 -- Correspondence (10)
Henderson, Junius, 1865-1937 -- Correspondence (10)
Henshaw, Henry W. (Henry Wetherbee), 1850-1930 -- Correspondence (1)
Henshaw, Samuel, 1852-1941 -- Correspondence (2)
Herbaceous Plants (1)
Herbaria (1)
Herbarium (54)
Hermit Crabs (2)
Herpetology (6)
Herrick, Harold -- Correspondence (10)
Herrick, Robert F. -- Correspondence (10)
Hersey, Frank Seymour, 1884- -- Correspondence (10)
Higbee, Harry G. -- Correspondence (11)
Higginson, Thomas Wentworth, 1823-1911 (5)
Hilgard, Eugene W (48)
Hill, James Haynes -- Correspondence (11)
Hillebrand, William, 1821-1886 (14)
Hinckley, Frank C. -- Correspondence (11)
History (2)
Hitchcock, G. N (19)
Hoar, Edward S. (Edward Sherman), 1823-1893 -- Correspondence (11)
Hoar, Samuel, 1845-1904 -- Correspondence (11)
Hodge, Clifton F. (Clifton Fremont), 1859-1919 -- Correspondence (11)
Hodges, F. S. -- Correspondence (11)
Hoffmann, Ralph -- Correspondence (1)
Holcomb, Leon C. -- Correspondence (11)
Holder, William (14)
Holmgren, Noel H (5)
Holzner, Frank X. -- Correspondence (11)
Hooker, William Jackson, (1)
Hoopes, Bernard A. -- Correspondence (11)
Hoopes, Josiah, 1832-1904 -- Correspondence (11)
Hornaday, William T. (William Temple), 1854-1937 -- Correspondence (10)
Hough, J. B (20)
House River (1)
Hovey, Edmund Otis, 1862-1924 (13)
Hovey West Indies Expedition (2)
Howard, L. O. (Leland Ossian), 1857-1950 -- Correspondence (10)
Howe, Marshall A. (Marshall Avery), 1867-1936 (1)
Howell, Arthur H. (Arthur Holmes), 1872-1940 -- Correspondence (10)
Howes, A. G. -- Correspondence (10)
Howland, John Snowdon, D. 1885 -- Correspondence (1)
Howland Island (1)
Hoyle, Charles Edwin -- Correspondence (1)
Huber, L. N (1)
Hudson, Woodward -- Correspondence (10)
Hudson Bay (2)
Huggins, B. P. -- Correspondence (10)
Hughes, Emily Nordhoff -- Correspondence (10)
Hunnewell, Mr. -- Correspondence (14)
Hunt, Harrison J., 1878-1967 (3)
Hunting (1)
Huntington, Dwight W. (Dwight Williams), 1851-1938 -- Correspondence (10)
Huntington, J. W. -- Correspondence (10)
Huyck, J. M. Van -- Correspondence (10)
Hyatt, Alpheus, 1838-1902 -- Correspondence (2)
Hydrocharitaceae (20)
Hydrographic Surveying (18)
Hydrography (18)
Höhnel, Franz, Ritter Von, 1852-1920 (1)
Ichthyology (179)
Icthyology (1)
Idaho (1)
Imperial County (Calif.) (4)
Ingalls, Charles E. -- Correspondence (10)
Ingersoll, Ernest, 1852-1946 -- Correspondence (2)
Ingraham, D. P. -- Correspondence (10)
Insects (9)
Insects--Alaska. (1)
International Geologic Congress (1)
Invertebrates (4)
Iridaceae (20)
Irvine, Clarke (22)
Iselin Expedition To Northern Labrador (1926) (1)
Islands Of The Pacific (1)
Isoetaceae (1)
Isoetes (1)
Iterson, F. Van -- Correspondence (10)
Jackson (4)
Jackson, Robert Tracy, 1861-1948 -- Correspondence (10)
Jackson, Thomas Hoopes, 1848-1922 -- Correspondence (10)
Jacobs, Joseph Warren, 1868- -- Correspondence (10)
Jamison, Harry K. -- Correspondence (10)
Japanese Whaling Expedition (1910) (4)
Jarvis Island (1)
Jeffries, John Amory, 1859-1892 -- Correspondence (10)
Jencks, Frederick T. -- Correspondence (10)
Jenners Crossroads (1)
Jerauld, Silas R. -- Correspondence (10)
Johnson, H. C. (Ornithologist) -- Correspondence (1)
Johnston Island (1)
Juglandaceae (22)
Juncaceae (69)
Juncus (68)
Juniperus (1)
Kellogg, A (16)
Kezar Falls (1)
Kimball, Jessie E. -- Correspondence (1)
Kiribati (1)
Kiritimati (1)
Kispiox (2)
Klotzsch, Fr. (Friedrich), 1805-1860 (2)
Knight, Ora Willis, 1874-1913 -- Correspondence (1)
Kotzebue (Alaska) (1)
Kramer, Raymond J (1)
Kumlien, Ludwig, 1853-1902 -- Correspondence (1)
Kure Atoll (1)
Laboulbeniales (5)
Lac Winnipeg (2)
Lamiaceae (1)
Lander County (Nev.) (1)
Landscapes (12)
Languages (1)
Larvae (1)
Lawrence, George N. (George Newbold), 1806-1895 -- Correspondence (1)
Lawson, George, 1827-1895 (1)
Legumes (1)
Leguminosae (20)
Lemmon, J. G (27)
Lemnaceae (20)
Lepismium (15)
Lespedeza (1)
Lesquereux, Leo, (22)
Letterman, George W (42)
Leuchtenbergia (16)
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Lichens (53)
Liliaceae (20)
Lindheimer, Ferdinand, (38)
Lipan (Ship) (1)
Liverworts (4)
Lizards (1)
Loranthaceae (42)
Loring, David -- Correspondence (8)
Los Angeles County (Calif.) (2)
Los Banos (Calif.) (1)
Lothrop, Oliver A. -- Correspondence (8)
Loud, Joseph P. -- Correspondence (8)
Lovell, Orville D. -- Correspondence (8)
Low, Chauncey E. -- Correspondence (8)
Lucas, Frederic A. (Frederic Augustus), 1852-1929 -- Correspondence (8)
Luce, Matthew -- Correspondence (8)
Lund (1)
Lusk, Richard D. -- Correspondence (8)
Luteyn, James L., 1948- (4)
Lyon County (Nev.) (1)
Lytle Creek Canyon (Calif.)--History. (1)
Macbride, Thomas H. (Thomas Huston), 1848-1934 -- Correspondence (2)
Mackay, George Henry, 1843- -- Correspondence (1)
Mackenzie (3)
MacMillan, Donald Baxter, 1874-1970 (8)
Macmillan, Lindsay (18)
Macoun, John, (4)
Macoun, John, 1831-1920 -- Correspondence (11)
Mahogany Mountain (1)
Maine (1)
Mallard (1)
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Mammals (49)
Mammillaria (Cactus) (19)
Mammillaria+(Cactus) (14)
Manana Island (1)
Manigault, Gabriel E. (Gabriel Edward), 1833-1899 -- Correspondence (11)
Mann, James R. -- Correspondence (11)
Marian Lake (1)
Marine Animals (3)
Marine Invertebrates (1)
Marine Mammals (1)
Marsh, Charles H. -- Correspondence (1)
Marshall, Peter (1)
Marshall, William Blanchard, 1865- -- Correspondence (11)
Marshall Islands (1)
Martin, Daniel S. (Daniel Strobel), 1842- -- Correspondence (11)
Martin, John, Of Palestine, Ore. -- Correspondence (11)
Martinique -- Description And Travel (1)
Maryland (2)
Mason, L. L. -- Correspondence (11)
Massachusetts (2)
Massachusetts. Department Of Fisheries, Wildlife, And Recreational Vehicles -- Correspondence (11)
Massachusetts Audubon Society -- Correspondence (15)
Maughan, J. -- Correspondence (11)
Maynard, C. J. (Charles Johnson), 1845-1929 -- Correspondence (1)
Maynard, Pauline T. -- Correspondence (11)
Mazyck, W. St. J (22)
McGirr, Newman F., 1877-1952 -- Correspondence (9)
McGregor, Richard C. (Richard Crittenden), 1871-1936 -- Correspondence (9)
McIlvain, J. H. -- Correspondence (9)
McIlwraith, Kennedy -- Correspondence (9)
McIlwraith, Thomas, 1824-1903 -- Correspondence (9)
McKechnie, Frederick Bridgman -- Correspondence (9)
McKown, C. K. -- Correspondence (9)
McLain, Walter E. -- Correspondence (9)
McLaughlin, R. B. -- Correspondence (9)
Mearns, Edgar Alexander, 1856-1916 -- Correspondence (1)
Mears, Ellis (4)
Meehan, Thomas, (55)
Meliaceae (1)
Mellichamp, J. H (127)
Melocactus (16)
Melvin, James C. -- Correspondence (1)
Merriam, C. Hart (Clinton Hart), 1855-1942 -- Correspondence (2)
Merrill, James Cushing, 1853-1902 (14)
Merrill, James Cushing, 1853-1902 -- Correspondence (2)
Meyer, Herbert E (8)
Microscope Slides (1)

Miller, Gerrit S. (Gerrit Smith), 1869-1956 -- Correspondence (1)
Miller, Olive Thorne, 1831-1918 -- Correspondence (1)
Millington, Lucy A (20)
Mineralogy (1)
Minot, Charles Sedgwick, 1852-1914 -- Correspondence (1)
Minot, H. D. (Henry Davis), 1859-1890. Land-birds And Game-birds Of New England -- Correspondence (1)
Miocene (1)
Miser, Hugh D. (Hugh Dinsmore), 1884-1969 McKnight, Edwin Thor, 1902-1992 Ulrich, Edward Oscar 1857-1944 (1)
Mission Zoologique Franco-anglo-américaine À Madagascar (1929-1931) (6)
Missoula County (Mont.) (1)
Mollusks (1)
Monell, Joseph, (16)
Mongolia -- Discovery And Exploration (3)
Mongooses (1)
Montana (1)
Moore, Miss -- Correspondence (14)
Morrill, Justin S. (Justin Smith), 1810-1898 -- Correspondence (14)
Morris, Robert Oliver, 1846-1925 -- Correspondence (1)
Mosquitoes (1)
Mosses (12)
Möllhausen, Balduin, (16)
Munro, William, 1818-1880 (1)
Musaceae (20)
Musser, Guy G (1)
Musser Field Trips To Indonesia (1973-1976) (1)
Mycology (6)
Najadaceae (22)
Najas (22)
Nash, George V. (George Valentine), 1864-1921 (6)
National Elk Refuge (1)
National Geographic Society Yale University Peruvian Expedition, 1915 (3)
National Museum Of Natural History (U.S.) Pacific Ocean Biological Survey Program (54)
Natural History--California--Mojave Desert. (1)
Natural History--Mexico--Guadalupe Island. (1)
Natural History--Mexico--Revillagigedo Islands. (1)
Nelson, Edward William, 1855-1934 -- Correspondence (1)
Neogene (2)
Nests (2)
Nevada (1)
Newberry, J. S (15)
New Hampshire (4)
New Paris (1)
Newton, Alfred, 1829-1907 -- Correspondence (1)
New York (3)
New York Aquarium (1)
Nicholls, H. A. Alford (Henry Alfred Alford), 1851-1926 (1)
Nichols, John White Treadwell, 1852-1920 -- Correspondence (1)
Nicholson, Francis -- Correspondence (1)
Norcross, H. L. -- Correspondence (10)
Norris, Joseph Parker, 1847-1916 -- Correspondence (1)
North+America (51)
North America (661)
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North Dakota (1)
North Nahanni (1)
Norway House (2)
Nyctaginaceae (22)
Nye County (Nev.) (3)
Oak (52)
Oberholser, Harry C. (Harry Church), 1870-1963 -- Correspondence (1)
Oldys, Henry -- Correspondence (1)
Oligocene (1)
Oliver Spanner And Co. -- Correspondence (1)
Olney, Stephen Thayer, 1812-1878 (3)
Ontario (1)
Ontogeny (1)
Opuntia (77)
Orchidaceae (20)
Orchids (1)
Ordovician (18)
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Ornithologists (49)
Ornithology (1,017)
Osmorhiza (2)
Ossipee (3)
Pacific Grove (Calif.) (3)
Pacific Ocean (22)
Pacific Ocean Biological Survey Program (414)
Packard, A. S. (Alpheus Spring), 1839-1905 -- Correspondence (1)
Paleobotany (75)
Paleontology (158)
Paleontology -- Gobi Desert (Mongolia And China) (3)
Paleontology -- Mongolia (3)
Palmae (20)
Palmer, Edward, (16)
Palynology (73)
Parasites (5)
Parish, S. B (35)
Parish Brothers (Nursery) (24)
Parker, Harry G. -- Correspondence (1)
Parker, Miss -- Correspondence (14)
Parry, C. C (97)
Patouillard, N (1)
Patten, Jane Boit, 1869-1964 (2)
Peabody, Putnam Burton, 1856-1937 -- Correspondence (1)
Peck, Charles H (20)
Peirce, George, 1808-1896 (1)
Pendleton (1)
Pennsylvania (3)
Pennsylvanian (14)
Pereskia (17)
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Philippine Sea (138)
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Plants (1,284)
Plants, Flowering Of (12)
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Plowman, Timothy (29)
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Poselger, H (25)
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Potamogetonaceae (22)
Powder River County (Mont.) (1)
Pribilof Islands (1)
Price, Paul H. (Paul Holland), 1898-Reger, David B. (David Bright), 1882-1958 (1)
Price, William W. -- Correspondence (1)
Primula (22)
Prince Rupert (1)
Pteridophyta (1)
Pucciniaceae (1)
Purdie, Henry Augustus -- Correspondence (1)
Pursh, Frederick, 1774-1820 (1)
Quayle, Ernest H., 1891-1956 (6)
Quercus (52)
Rabenhorst, Ludwig, 1806-1881 (1)
Ragsdale, George Henry -- Correspondence (1)
Rainey African Expedition, 1911-1912 (1)
Rand, Austin Loomer, 1905-1982 (3)
Rattus (3)
Rawaki (1)
Reptiles (10)
Reptiles--California. (3)
Research (38)
Revillagigedo Islands (Mexico). (1)
Rhipsalis (15)
Rhoads, Samuel N. (Samuel Nicholson), 1862-1952 -- Correspondence (1)
Richards, Guy, D1979 (1)
Richardson, William Bebb (4)
Richmond, Charles Wallace, 1868-1932 (2)
Richmond, Charles Wallace, 1868-1932 -- Correspondence (1)
Rickett, Harold William, 1896-1989 (1)
Ricksecker, Edmund -- Correspondence (1)
Ridgway, John L., 1859-1947 (1)
Ridgway, Robert, 1850-1929 (1)
Ridgway, Robert, 1850-1929 -- Correspondence (1)
Rigby, George H. -- Correspondence (1)
Riley, Charles V (19)
Riverside County (Calif.) (4)
Robinson, John, 1846-1925 -- Correspondence (1)
Rodents (2)
Roetter, Paulus (13)
Rosaceae (20)
Rosebud County (Mont.) (1)
Rubiaceae (1)
Rust Fungi (2)
Sage, John Hall, 1847-1925 -- Correspondence (1)
Sagittaria (22)
Saint Vincent -- Description And Travel (1)
Salicaceae (22)
Salt Lake City (1)
San Bernardino County (Calif.) (4)
Sander, Enno, (12)
Sandsbury, John R. -- Correspondence (1)
San Francisco Bay Area (Calif.) (1)
San Gabriel Mountains (Calif.) (1)
San Joaquin County (Calif.) (1)
Sapindaceae (20)
Sargent, Charles Sprague, (19)
Saunders, Howard, 1835-1907 -- Correspondence (1)
Saxifragaceae (20)
Schiffner, Victor, 1862-1944 (2)
Schott, Arthur, (108)
Schubert, Bernice (1)
Scientific Expeditions (160)
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Scientific Expeditions -- Mongolia (3)
Scientific Expeditions. (1)
Scott, W. D. -- Correspondence (1)
Scott, William Earl Dodge, 1852-1910 -- Correspondence (2)
Scrophulariaceae (2)
Sea Birds (51)
Seale, Alvin, 1871-1958 -- Correspondence (1)
Sea Lion Rock (1)
Seals (Animals) (17)
Sea Turtles (1)
Seismometry (1)
Selkirk (2)
Selkirk Mountains (1)
Sennett, George B. (George Burritt), 1840-1900 -- Correspondence (2)
Seton, Ernest Thompson, 1860-1946 -- Correspondence (1)
Shearwaters (1)
Shore Birds (4)
Shore Birds--Alaska. (2)
Shore Birds--Behavior (4)
Siler, A. L (3)
Silurian (6)
Silver Hill (1)
Sino-American Botanical Expedition To Western Hubei Province, People's Republic Of China (1980) (4)
Sir, (1)
Siskiyou County (Calif.) (1)
Skeena (1)
Smith, Charles E (15)
Smith, Elizabeth F. -- Correspondence (2)
Smith, Greene (2)
Smithsonian Institution -- Correspondence (1)
Smithwick, J. W. P. (John Washington Pearce), 1870- -- Correspondence (11)
Smyth, Ellison A. (Ellison Adger), 1863-1941 -- Correspondence (11)
Social Life And Customs (1)
Solanaceae (1)
Solms-Laubach, Hermann, (20)
South Park (1)
Southwick, James M. -- Correspondence (1)
Spalding, Thorndike -- Correspondence (11)
Spalding-Peterson Expedition (1959) (1)
Spanner, Oliver -- Correspondence (1)
Sparganium (20)
Spaulding, Fred. Benjamin -- Correspondence (11)
Spelman, Henry Munson -- Correspondence (11)
Spencer, J. S. -- Correspondence (11)
Spongberg, Stephen A (4)
Sprague, Charles J. (Charles James), 1823-1903 (1)
Sprague, Isaac, 1811-1895 -- Correspondence (11)
Spruce, Richard, (1)
Squids (1)
St. Louis Exposition (1)
Stanislaus County (Calif.) (2)
Starfish (1)
Stearns, Winfrid Alden, 1852-1909 -- Correspondence (1)
Steere, William Campbell, 1907-1989 (3)
Stejneger, Leonhard, 1851-1943 -- Correspondence (11)
Stephani, Franz, 1842-1927 (1)
Stephens, Frank, 1849-1936 (2)
Stone, Witmer, 1866-1939 -- Correspondence (1)
Storm Petrels (1)
Stratigraphy (197)
Strong, W. C. (William Chamberlain), 1823-1913 (1)
Suchetet, Andre, 1849- -- Correspondence (11)
Sullivant, William Starling, 1803-1873 (3)
Surber, Thaddeus, 1871-1949 -- Correspondence (11)
Swales, Bradshaw Hall, 1875-1928 -- Correspondence (11)
Takhtadzhi︠a︡n, A. L. (Armen Leonovich) (1)
Takla Lake (2)
Taongi (1)
Tate, G. H. H. (George Henry Hamilton), 1894-1953 (2)
Tate, Geoffrey M., 1898-1964 (4)
Taxidermists (1)
Taxidermists -- Ontario -- Toronto -- Correspondence (1)
Taxidermy (1)
Taylor, Thomas, (1)
Taylor, Thomas, -1848 (1)
Tennessee (1)
Terns (3)
Thaxter, Roland, 1858-1932 (2)
Thaxter, Roland, 1858-1932 -- Notebooks, Sketchbooks, Etc (1)
Thayer, Abbott Handerson, 1849-1921 -- Correspondence (1)
Thayer, John Eliot, 1862-1933 -- Correspondence (2)
Thoreau, Henry David, 1817-1862 (1)
Thurber, George, 1821-1890 (2)
Tides (2)
Topping, David LeRoy, 1861-1939 (1)
Torrey, Bradford, 1843-1912 -- Correspondence (1)
Torrey, John, (22)
Towne, E. B. -- Correspondence (2)
Townsend, Charles Wendell, 1859-1934 -- Correspondence (1)
Townsend Cromwell (Ship) (13)
Travel (119)
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United States. Arctic Research Laboratory (7)
United States. Bureau Of Biological Survey (21)
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Urticaceae (22)
USA (2)
US National Museum (1)
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Van Brunt And Howe -- Correspondence (1)
Van Deusen, Hobart M (12)
Vasey, George, (26)
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Violets (1)
Virginia (3)
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Walla Walla County (Wash.) (1)
Warren, Benjamin Harry, 1858-1926 -- Correspondence (1)
Warren, Edward Royal, 1860-1942 -- Correspondence (1)
Warren, George -- Correspondence (2)
Warren, J. E. -- Correspondence (2)
Washington (1)
Washington University Expedition To Panama (1934-1935) (1)
Washoe County (Nev.) (1)
Water Birds--Alaska. (2)
Watrous, Clarence H. -- Correspondence (1)
Watson, Sereno, (126)
Watson, Sereno, 1826-1892 (20)
Webb, Walter Freeman, 1869- -- Correspondence (1)
Weber, William A. (William Alfred), 1918- (1)
Webster Springs (1)
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Werner, W. H. -- Correspondence (1)
Western Interior Seaway (40)
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Whales -- Japan (4)
Whales -- Korea (4)
Whales -- North Pacific Ocean (4)
Wheaton, John M., 1841-1887 -- Correspondence (1)
White, Mary Abby -- Correspondence (2)
White Pine County (Nev.) (1)
Whitney South Sea Expedition Of The American Museum Of Natural History (1920-1941) (66)
Williams, Mrs. -- Correspondence (14)
Williams Galápagos Expedition (1923) (1)
William Wesley & Son -- Correspondence (1)
Wilson, James -- Correspondence (14)
Wolfcamp Fm (4)
Women In Science (2)
Wood (1)
Woodruff, Lewis B. -- Correspondence (14)
Woodward, Paul W (1)
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Worthington, Willis W. -- Correspondence (1)
Wright, Charles, (13)
Wright, Charles, 1811-1885 (1)
Wyoming (4)
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Zoology (11)