
Spherometer, 3-legged type
1875-1885
1875-1885
1876
1878
1876
1876
1877
1877
1877
30 CE
30 CE
1885
1885
1885
1876
2686-2613 BCE
1883
1884
1875
1878-1867 (design)
1879
1885
circa 1880
1881
1880
1880
1876
1876
1880
1859; 1986
1885
1880
1888-185
1874
1874
1945-50
1874
1880
1879
1885
1879
1879
1879
1879
1879
1876
1876
1878-1883
1878-1883
1878-1883
1876