Trichina Microscope "Teschner", c. 1900
The microscope has rack-and-pinion focusing. Stamped on wooden table "W. Teschner, Berlin". Inside the door, a magnification table with microscope serial number 5162; this is different from the one impressed on the stage (5159).
Trichina (Trichinella spiralis) is a parasitic nematode worm that causes trichinosis, a serious disease in humans and other meat-eating mammals. Free Trichinella were seen for the first time by Zenker in 1860 and Rudolph Virchow (1821-1902) succeeded in inducing various German states to make the testing of pig's meat for trichinosis in abattoirs compulsory (c. 1870).