4 0 c m
33cm
actual image size: 25cm x 32cm
Description
Liquid oxygen was contained in the 5 litre vacuum walled flask. As oxygen evaporated, it built up presure, and the gas was forced up and through the coil element on top. A tube took it to the airman's mask.
Image Details
Image Ref.
10237470
© Science Museum / Science & Society Picture Library