
Grainger's simple pocket microscope
1800
1800
1800
20-400
1802
1795
1805
1800
400 BCE-100 CE; 1900-1936
100 BCE-100 CE; 1900-1936
100 BCE-100 CE; 1900-1936
1804
1801-1800
1-79 CE; before 1914
2000-1350
2000-1350
2000-1350
2000-1350
2000-1350
1370-1350 BCE; 1931
30-200
1931; 250 BCE
2000-1350
20-500
1798-1803
1802
1800
1370-1350 BCE; 1931
1800
1796-1797
2000-1350
20-500
20-400
1807
1807
1808
1798
1796
1796
1799
1809
1808
1808
1940-1050
1805
1808
1808
1808
1808
1808
1808