Photo negatives showing insertion of rabbit ear chambers
1956
1956
1930-1980
1953
1932
1964-1972
1892
1856
1964-1972
1896
1930-1970
1900-1910
1860
1839
1857
1855-1856
1910
1902-1912
1856
1846
1846
1846
1846
1846
1846
1846
c1863-c1926