Note on Heat-absorbing Glass
JSGT 1931 V15 T208-T212
In order to minimise the inconvenience of a high temperature on a bright sunny day inside a building with a glass roof or skylights, the use of special absorptive glass has been advocated and the extent of the absorption of heat in relation to the amount of light transmitted has been taken as the test of efficiency.
A. F. Dufton