-
Brace, John P. Feb. 15, 1849
-
Bradford, Thomas L. Feb. 21, 1891 [to S. Watson]
-
L. H. Bradford & Co. Apr. 18, 1856
-
Watson, Sereno Sept. 1871 [to L. H. Bradford & Co.]
-
Bradley, Cornelius B. Dec. 31, 1872
-
Bramwell, Frederick J. Dec. 31, 1882
-
Bramwell, Frederick J. June 24, 1887
-
Bramwell, Frederick J. June 27, 1887
-
Brandegee, Townshend S. June 9, 1874
-
Brandegee, Townshend S. Oct. 19, 1877
-
Brandegee, Townshend S. Jan. 15, 1884 [forwarded by W. M. Canby]
-
Brandegee, Townshend S. Jan. 15, 1884 [forwarded by W. M. Canby] [list]
-
Brandegee, Townshend S. Aug. 30, 1888 [to S. Watson]
-
Brandegee, Townshend S. Oct. 31, 1888 [to S. Watson]
-
Brandegee, T. S. and Katharine Sept. 10, 1891 [to J. Gray]
-
Brandegee, Townshend S. Mar. 29 [no year]
-
Brandegee, Townshend S. Oct. 11 [no year]
-
Braun, Alexander Aug. 1, 1850
-
Braun, Alexander Nov. 12, 1852
-
Braun, Alexander Oct. 16, 1854
-
Braun, Alexander July 16, 1866
-
Braun, Alexander Sept. 3, 1866
-
Braun, Alexander Dec. 29, 1866
-
Braun, Alexander May 17, 1875
-
Braun, Alexander Mar. 29, 1877 [death notice]
-
Braun, Alexander undated
-
Braun, Alexander undated [2nd item]
-
Brendel, Frederick Apr. 3, 1878
-
Brendel, Frederick Sept. 11, 1892 [to J. Gray]
-
Brendel, Frederick Nov. 20, 1892 [to J. Gray]
-
Brewer, William H. Mar. 26 [no year]
-
Brewer, William H. Feb. 18, 1855
-
Brewer, William H. Jan. 7, 1861
-
Brewer, William H. June 10, 1861
-
Brewer, William H. Jan. 4, 1862
-
Brewer, William H. May 13, 1862
-
Brewer, William H. June 2, 1862
-
Brewer, William H. Aug. 11, 1862
-
Brewer, William H. Oct. 27, 1862
-
Brewer, William H. Jan. 2, 1863
-
Brewer, William H. Mar. 21, 1863
-
Brewer, William H. Mar. 31, 1863
-
Brewer, William H. June 5, 1863
-
Brewer, William H. Aug. 13, 1863
-
Brewer, William H. Nov. 11, 1863
-
Brewer, William H. Dec. 1, 1863
-
Brewer, William H. Feb. 22, 1864
-
Brewer, William H. Apr. 2, 1864
-
Brewer, William H. June 22, 1864
-
Brewer, William H. Nov. 23, 1868 [to A. and J. Gray]
-
Brewer, William H. Apr. 5, 1870
-
Brewer, William H. Sept. 6, 1870
-
Brewer, William H. Nov. 5, 1870
-
Brewer, William H. Dec. 18, 1873
-
Brewer, William H. Dec. 22, 1873 [to S. Watson]
-
Brewer, William H. Aug. 12, 1874
-
Brewer, William H. Nov. 14, 1877
-
Brewer, William H. 1878 [to S. Watson]
-
Brewer, William H. May 21, 1880 [to S. Watson]
-
Brewer, William H. Dec. 16, 1887 [to S. Watson]
-
Brewer, William H. June 21, 1888 [to S. Watson]
-
Brewer, William H. Dec. 28, 1888 [to S. Watson]
-
Brezina, Aristides May 20, 1887
-
Bridges, George Apr. 15, 1851
-
Bridges, George Oct. 11, 1851
-
Bridges, George Oct. 16, 1851
-
Bridges, George Dec. 15, 1851
-
Bridges, George Dec. 22, 1851
-
Bridges, George Jan. 5, 1852
-
Bridges, George Jan. 8, 1852
-
Bridges, George Apr. 14, 1852
-
Bridges, George May 15, 1852
-
Bridges, George July 9, 1852
-
Bridges, George Aug. 29, 1852
-
Bridges, George Sept. 25, 1852
-
Bridges, George Mar. 10, 1853
-
Bridges, George Mar. 16, 1853
-
Bridges, George May 17, 1853
-
Bridges, George Aug. 23, 1853
-
Bridges, George Oct. 21, 1853
-
Bridges, George Oct. 27, 1853
-
Bridges, George Nov. 3, 1853
-
Bridges, George Dec. 27, 1853
-
Brigham, William T. Mar. 25, 1871
-
Brigham, William T. Feb. 23, 1889 [to S. Watson]
-
Brigham, William T. Aug. 26, 1890 [to S. Watson]
-
Brigham, William T. Dec. 9, 1890 [to S. Watson]
-
Brill, Evert J. Nov. 25, 1851
-
Brill, Evert J. Nov. 25, 1851 [attached note]
-
Brill, Evert J. Oct. 13, 1852 [attached letter]
-
Brill, Evert J. Oct. 13, 1852
-
Brill, Evert J. Feb. 10, 1855
-
Brill, Evert J. undated
-
Brimmer, George June 21, 1886 [to W. Trelease]
-
Britten, James May 1, 1882
-
Britten, James Feb. 17, 1883
-
Britton, Nathaniel L. Mar. 22, 1882
-
Britton, Nathaniel L. Sept. 4, 1882 [to S. Watson]
-
Britton, Nathaniel L. Mar. 4, 1884 [to S. Watson]
-
Britton, Nathaniel L. Nov. 25, 1884 [to S. Watson]
-
Britton, Nathaniel L. Nov. 30, 1887
-
Britton, Nathaniel L. Jan. 1, 1888 [to S. Watson]
-
Britton, Nathaniel L. Apr. 2, 1888
-
Britton, Nathaniel L. Apr. 8, 1888 [to S. Watson]
-
Britton, Nathaniel L. Apr. 15, 1888
-
Britton, Nathaniel L. May 3, 1888 [to S. Watson]
-
Britton, Nathaniel L. May 8, 1888 [to S. Watson]
-
Britton, Nathaniel L. July 3, 1888 [to S. Watson]
-
Britton, Nathaniel L. Aug. 20, 1888 [to S. Watson]
-
Britton, Nathaniel L. Nov. 19, 1888 [to S. Watson]
-
Britton, Nathaniel L. Jan. 19, 1889 [to S. Watson]
-
Britton, Nathaniel L. Jan. 24, 1889 [to S. Watson]
-
Britton, Nathaniel L. Mar. 26, 1889 [to S. Watson]
-
Britton, Nathaniel L. May 15, 1889 [to S. Watson]
-
Britton, Nathaniel L. May 17, 1889 [to S. Watson]
-
Britton, Nathaniel L. May 21, 1889 [to S. Watson]
-
Britton, Nathaniel L. May 23, 1889 [to S. Watson]
-
Britton, Nathaniel L. May 25, 1889 [to S. Watson]
-
Britton, Nathaniel L. Aug. 19, 1889 [to S. Watson]
-
Britton, Nathaniel L. Sept. 13, 1889 [to S. Watson]
-
Britton, Nathaniel L. Sept. 18, 1889 [to S. Watson]
-
Britton, Nathaniel L. Oct. 21, 1889 [to S. Watson]
-
Britton, Nathaniel L. Oct. 29, 1889 [to S. Watson]
-
Britton, Nathaniel L. Dec. 16, 1889 [to S. Watson]
-
Britton, Nathaniel L. Jan. 6, 1890 [to S. Watson]
-
Britton, Nathaniel L. Feb. 5, 1890 [to S. Watson]
-
Britton, Nathaniel L. Feb. 28, 1890 [to S. Watson]
-
Britton, Nathaniel L. Mar. 4, 1890 [to S. Watson]
-
Britton, Nathaniel L. Mar. 12, 1890 [to J. Gray]
-
Britton, Nathaniel L. Apr. 29, 1890 [to S. Watson]
-
Britton, Nathaniel L. May 19, 1890 [to S. Watson]
-
Britton, Nathaniel L. June 11, 1890 [to S. Watson]
-
Britton, Nathaniel L. June 17, 1890 [to J. Gray]
-
Britton, Nathaniel L. June 30, 1890 [to S. Watson]
-
Britton, Nathaniel L. July 5, 1890 [to S. Watson]
-
Britton, Nathaniel L. Jan. 8, 1891 [to M. L. Fernald]
-
Britton, Nathaniel L. Jan. 21, 1891 [to S. Watson]
-
Britton, Nathaniel L. Mar. 23, 1891 [to S. Watson]
-
Britton, Nathaniel L. May 7, 1891 [to S. Watson]
-
Britton, Nathaniel L. June 1, 1891 [to S. Watson]
-
Britton, Nathaniel L. June 5, 1891 [to S. Watson]
-
Bromfield, Eliza undated
-
Bromfield, William A. Sept. 7, 1848
-
Brongniart, Adolphe T. Mar. 10, 1858
-
Brongniart, Adolphe T. Nov. 30, 1858
-
Brongniart, Adolphe T. Apr. 15, 1860
-
Brongniart, Adolphe T. Feb. 5, 1861
-
Brongniart, Adolphe T. Feb. 25, 1865
-
Brongniart, Adolphe T. June 7 [no year]
-
Brooks, William K. Jan. 4, 1884
-
Brotherus, Victor F. May 5, 1891 [to W. G. Farlow] [postcard]
-
Brotherus, Victor F. June 4, 1875
-
Brown, Addison Feb. 15, 1881 [to H. C. Jones]
-
Brown, Franklin Oct. 4, 1886
-
Browne, Walter R. Dec. 22, 1880
-
Browne, Walter R. Dec. 22, 1880 [enclosure]
-
Browne, Walter R. Jan. 1881
-
Browne, Walter R. Jan. 31, 1882
-
Browne, Walter R. July 21, 1884
-
Browne, Walter R. [1884]
-
Browne, Effie L. Nov. 9, 1884
-
Browne, Effie L. Nov. 9, 1884 [enclosed memorial]
-
Bruhin, Thomas A. Feb. 21, 1870
-
Bruhin, Thomas A. July 1, 1878
-
Bryce, James June 25 [no year]
-
Bryce, James June 28 [no year]
-
Bryce, James July 31 [no year]
-
Bryce, James Dec. 11 [no year]
-
Buchenau, Franz G. Jan. 20, 1880 [to S. Watson]
-
Buchenau, Franz G. Apr. 10, 1886
-
Buchenau, Franz G. Nov. 27, 1887 [to S. Watson]
-
Buchenau, Franz G. Aug. 27, 1888 [to S. Watson]
-
Buchenau, Franz G. Feb. 3, 1892 [to S. Watson]
-
Buchinger, Jean D. Jan. 3, 1882
-
Buckley, Samuel B. Apr. 6, 1843
-
Buckley, Samuel B. Apr. 11, 1843
-
Buckley, Samuel B. Nov. 18, 1856
-
Buckley, Samuel B. Dec. 2, 1856
-
Buckley, Samuel B. Apr. 6, 1858
-
Buckley, Samuel B. Apr. 25, 1858
-
Buckley, Samuel B. May 25, 1858
-
Buckley, Samuel B. May 30, 1858
-
Buckley, Samuel B. Sept. 24, 1858
-
Buckley, Samuel B. Nov. 20, 1858
-
Buckley, Samuel B. Jan. 25, 1859
-
Buckley, Samuel B. Feb. 5, 1859
-
Buckley, Samuel B. Mar. 19, 1862
-
Buckley, Samuel B. Mar. 23, 1862
-
Buckley, Samuel B. Mar. 26, 1862
-
Buckley, Samuel B. Apr. 7, 1862
-
Buckley, Samuel B. Apr. 17, 1862
-
Buckley, Samuel B. undated
-
Watson, Sereno undated list [on letter from P. J. Berckmans]
-
Bumstead, Freeman J. Mar. 8, 1871
-
Bunbury, Charles J. Mar. 3, 1884
-
Bunge, Alexander von Mar. 18, 1864
-
Burdick, Justin H. May 15, 1884
-
Burdick, Justin H. Apr. 29, 1885 [to S. Watson]
-
Bureau, L. Édouard Feb. 23, 1874
-
Bureau, L. Édouard Aug. 27, 1874
-
Bureau, L. Édouard Jan. 15, 1880
-
Bureau, L. Édouard undated fragment
-
Bureau, L. Édouard Feb. 12, 1895
-
Bureau, L. Édouard May 7, 1901
-
Bureau, L. Édouard Nov. 22, 1901
-
Bureau, L. Édouard Nov. 7, 1902
-
Burgess, R. Oct. 25, 1891 [to S. Watson]
-
Burgess, T. J. W. Nov. 15, 1888 [to J. Gray]
-
Burgess, T. J. W. Feb. 4, 1890 [to S. Watson]
-
Burgess, T. J. W. Aug. 18, 1891 [to S. Watson]
-
Büse, Lodewijk H. July 4, 1864
-
Büse, Lodewijk H. July 31, 1872
-
Büse, Lodewijk H. Dec. 20 [no year]
-
Bush, Benjamin F. June 8, 1889 [to S. Watson]
-
Bush, Benjamin F. Sept. 1, 1889 [to S. Watson]
-
Bush, Benjamin F. Feb. 10, 1890 [to S. Watson]
-
Bush, Benjamin F. Aug. 18, 1891 [to S. Watson]
-
Bush, Benjamin F. Sept. 13, 1891 [to S. Watson]
-
Bush, Benjamin F. Sept. 16, 1891 [to S. Watson]
-
Bush, Benjamin F. Jan. 28 [no year] [to S. Watson]
-
Butz, George C. Aug. 12, 1890 [to S. Watson]