bild

Clinical thermometer patent, 1882. Printed patent drawing of a thermometer invented by US instrument maker Adolph Bayer (c.1845-1900). Bayer, working in New York, manufactured clinical thermometers. This design is a type of mercury thermometer. This is patent number 263,649 from the US Patent Office, dated 29 August 1882. (KEYSTONE/SCIENCE PHOTO LIBRARY/US NATIONAL ARCHIVES AND RECORDS ADMINISTRATION/SCIENCE PHOTO LIBRARY)