Episode number 3 of Series “Transference of Heat”.
Explains how heat sources emit radiations both as heat waves or infra-red waves and as light waves; how objects absorbing heat radiations rise in temperature; how heat is produced in glass-houses and how such glass-houses are cooled; explains the effects of clouds on radiation from the sun; shows how the shape of the earth results in different concentrations of the sun’s radiation at the poles and at the equator.
How to watch
In ACMI's collection
Black and White
16mm film; Access Print (Section 1)
16mm film; Limited Access Print (Section 2)