Urinometer with test tube in cylindrical cardboard case
1830-1900
Two test tubes inside cylindrical leather case
1851-1900
2 electrodes in test tubes, European, 1900-1910
1900-1910
Set of 6 test tubes
Acufirm lumbar puncture set
1930-1943
Haemaglobinometer; Germany
1890-1930
Test tube with suction holder
Test tube with suction holder
Sahli(?) haemaglobinometer set in leatherette case
Glass bottle which contains a test-tube full of ammonium tartrate crystals prepared by fermentation of the racemate
1855-1860