Microscopy (Wellcome)
1857-1865
1830-1850
1826
Microscopes
1671-1700
1925-1940
1870-1880
1790-1810
1870-1888
1890-1900
1906-1945
1831-1870
Scientific Instruments & Research
1950
1851-1900
1801-1900
1915-1925
1863-1866
1845-1900
1840-1850
1894-1925
1850-1855
1740
1860-1870
1950-1957
1907
c.1900
1860-1865
1917
c.1890
Photographic Technology
1905-1915
1962
1855
1879
1935
1885-1895
1861
1925-1935