Word: spectras
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...most important results from the investigations of the past year, are described as follows: The number of photographs taken with the Draper telescopes is 3139, and the examination of the spectra contained on these plates and on those taken with the Bruce and the Bache telescopes has led to the discovery of twenty-three variable stars. A new star was also found in the constellation Sagittarius. Perhaps the most important investigation undertaken during the year with these photographs was the search for the planet Eros during its opposition in 1894. The detailed study of the spectra of the southern stars...
...Henry Draper. To be expended by the Director of the Observatory in the research of photographing stellar spectra...
...Observatory, for the last few days, there has been an interesting exhibit of glass positives and paper prints, illustrating the buildings which the Observatory has occupied at various stations, and the astronomical instruments used there. Besides these, the exhibit contains several photographs of stars, moons, and spectra...
Physical Colloquium. Liebenow's Theory of the Electrical Resistance of Metals. Professor Hall.--Instantaneous photograph of Spectra. Professor Trowbridge. Jefferson Physical Laboratory, room...
Physical Colloquium. Liebenow's Theory of the Electrical Resistance of Metals. Professor Hall.--Instantaneous photograph of Spectra. Professor Trowbridge. Jefferson Physical Laboratory, room...