Ultra-violet Light Transmitting Glasses

JSGT_1928_V12_T306_T324

The discovery and investigation within the last decade of the therapeutic action of the sun's rays and of the rays from specially devised artificial sources, especially those rays which extend over the range of wave-length between 3150 and 2950 Å, have also stimulated effort to produce glasses for windows transparent to these rays, since ordinary window glass absorbs them.

David Starkie & W. E. S. Turner