Signedmarked on barrel: CARL ZEISS / JENA [in achromat trademark]
marked on barrel: GERMANY
Inscribedserial number: Nr. 13322
FunctionThe cardioid condenser was employed for the microscopic examination of colloidal solutions using a dark-ground method of observation.
Historical AttributesThis instrument was used in the Farlow Herbarium.
ProvenanceFarlow Herbarium