Word: spectras
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...towering compendium of dots and streaks in photographic gelatine which, to the theoretical physicist, suggest the whence and the whither of all things. By means of the Harvard plates three-fourths of all known variable stars have been discovered, the majority of new stars recognized, the spectra of a million stars recorded...
...Spectra and Sound...
Professor Frederick A. Saunders has done his main work in spectroscopy; he was a pioneer in the study of series spectra long before the importance of this subject was generally recognized. He is also an authority in the domain of sound from the theoretical, practical and aesthetic points of view. In this field he has been the successor at Harvard of Professor Sabine...
...foot concave grating, and a special room to house it with a constant temperature for spectra study...
...Physical Society in June 1931. Professor W. Pauli of the Institute of Technology at Zuruch, Switzerland, also suggested the utility of the neutron when he spoke last spring before the American Physical Society. He suggested that the neutron might offer a reasonable explanation of some fine structure in the spectra of elements