Publisher's Synopsis
Excerpt from Wave-Length Measurements in Arc Spectra Photographed in the Yellow, Red, and Infra-Red
For several years the Bureau of Standards has been conducting grating measurements in red and infra-red arc spectra by the aid of specially sensitized photographic plates to improve the data in this region and to find some element which would furnish lines suitable for wave-length standards in this region. To the 25 elements already measured the following are here added: Silver, aluminum, gold, bismuth, cadmium, mercury, lead, antimony, tin, and zinc.
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