Faichney Rectal and PS Permaseal Oral Mercury Thermometers with Metal Case

Description: Since the early days of medicine, physicians have used body temperature as a tool of patient diagnoses. It wasn’t until the 16th century, however, that devices to measure changes in body temperature were developed. And even with the creation of these instruments, their widespread clinical use only began in the 1870’s when Carl Reinhold Wunderlich, a professor of medicine in Leipzig, Germany, connected changes in body temperatures with severity of illness.

Origin: Circa 1920-1930; United States

Manufacturer: Faichney and Perfektum