Word: spectra
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...experiments here began several years ago with calculations by Leo Goldberg, Bemis Fellow of the Observatory, of the theoretical "strengths" of related lines in the spectra of various elements. Following this, Menzel extended the quantitative theory of absorption line formation...
...separate them into two one-year courses? They would both take at least 8 hours a week of laboratory work and would preferably not be taken simultaneously. The chemical course would be of slightly broader scope than the present Chemistry 4, having one or two group experiments involving mass spectra and spectroscopy, and the lecture material might cover more advanced methods of analysis than laboratory facilities allowed in practical work...
...rooms of cross-indexed fingerprints and nicknames, the rows of white coated technicians and microscopes and test tubes. When it had to decide which knife had cut through a copper screen, the F.B.I. placed filings from the different knives and from the screen in a burner and compared the spectra they gave off. It has plastic material for impressions of footprints and tire treads so nice that a plaster cast of a hand can be made to give accurate and serviceable fingerprints...
...carry umbrellas coated with lead before venturing under the glare of "Nova Cassiopeiae." Other highlights of the astronomers' convention: Nos- 60, 61, 62. In the sun hydrogen, helium, calcium, sodium, carbon, nitrogen, and many another terrestrial element have been identified by comparing the solar spectrum with very clear spectra of substances photographed in the laboratory...
...double program is planned by the Crimson forces, who will endeavor not only to fathom the spectra of the sun's atmosphere and take numerous photographs of the phenomena, but also to take along a group of graduate students under the direction of Harry R. Mimno '28, assistant professor of Physics, to make radio studies of the Kennely-Heavyside layer and its effect upon radio waves...