Word: reflector
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Dates: during 1940-1949
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...unique feature of this new Jewett Reflector telescope is to be found in the manner in which it is housed; the entire building revolving on a special concrete base. Usually only a top of turret or dome rotates on tracks supported by a non-rotating building. The Jewett Reflector rotating building is twelve-sided and is insulated with homosote. Construction was under the direct supervision of Dr. George Z. Dimitroff, superintendent of the Oak Ridge station...
This new type reflector, it was explained, combines the advantages of the reflecting telescope and of the large-field photographic refractor. If both refracts and reflects. Ordinary reflecting telescopes cover satisfactorily only a fraction of one square degree of the sky at a time, but the new Jewett Reflector can cover from ten to a hundred square degrees, depending on the properties chosen for optical parts and mechanical parts. It is particularly effective for surveys of the distribution of galaxies and stars, variations of stars, and other problems where a large coverage and high speed are essential...
...mounting for the telescope is of the two-pier type, but the special nature of the Schmidt-type reflector has made it necessary to include several unusual features. Construction is being super-intended by Mr. Herbert E. Hanson of the observatory staff. Except for the polar axis and counterweights, the mounting is of Dowmetal,--probably the first telescope mounting ever made of this specially light and strong magnesium alloy. The Dow Chemical Company, of Midland, Mich., cooperated in providing the difficult castings necessary for both the telescope tube and mounting...
...Jewett Reflector is considered one of the three or four most important telescopes of the twenty-five in regular use at the Harvard Observatory, and in some ways, because of its unusual adaptability, the most important. It will greatly extend the survey of external galaxies in the northern hemisphere. Observatory officials believe that perhaps a million galaxies will be within its range...