Em Weinel, Medical Technologist, Laboratory in North Building, Milwaukee Sanitarium, Late 1950's. She is using a Coleman Spectro Photometer. This instrument measures intensity of light while measuring..
Em Weinel, Medical Technologist, Laboratory in North Building, Milwaukee Sanitarium, Late 1950's. She is using a Coleman Spectro Photometer. This instrument measures intensity of light while measuring blood sugar (glucose). **This is from note on back of the picture**
