Early Scientific Instruments

Vintage photographs of scientific instruments and plumbing fixtures from the early 20th century, detailing their designs and functions in historical contexts.

A photograph showing the temperature of gas masks in a Chemical Warfare Service facility. The location of thermometers in a B.R. hood is depicted. This image was received on April 2, 1919, and is numbered 54568. It is accompanied by notes indicating it was issued with the designation "1130."
A photograph showing the temperature of gas masks in a Chemical Warfare Service facility. The location of thermometers in a B.R. hood is depicted. This image was received on April 2, 1919, and is numbered 54568. It is accompanied by notes indicating it was issued with the designation "1130."