Travel Microscope
circa 19th century
circa 19th century
1796-01-06
circa 1800
undated
1795-12-21
undated
circa 19th century
1795-11-28
undated
1839-1841
circa 1860-1900
1862
1827
undated
1970s
circa 1805
1820
circa 1861-1865
undated
1815-04-11
circa 1861-1865
1835
circa 1940
circa late 18th century
circa 1802
circa late 18th century
undated
1804
1900-05
circa 1900
circa 1830-1840
undated
circa 1910s
circa late 18th century
1943
undated
1943
1954-04-15
1943
circa early 19th Century
undated
1801
circa 1815
circa 1830-1850
circa 1949
1922
undated
1960s
undated
circa 1840s
circa late 18th century
circa 1906-1907
circa 1839-1840
circa 1950
1830
undated
1832
circa 1776
undated
1862