Word: inchers
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Dates: during 1932-1932
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...years those will rank as the world's fourth largest instruments, after Carnegie Institution's 100-in. telescope at Mount Wilson, the Dominion Astrophysical Observatory's 72-in. at Victoria, B. C.. Perkins Observatory's 69-in. at Delaware, Ohio. Near Bloemfontein, South Africa Harvard owns a 60-incher. The Harvard observatories at Bloemfontein and Harvard (the town) are practically equidistant from the equator, positions which give Harvard well-nigh perfect opportunity to rake the heavens and amplify patient Dr. Annie Jump Cannon's stupendous catalog of the stars (more than 225,000 spectra already...
Other New Observatories. One old and one new reason limited Harvard's tenure of fourth-biggest-telescope position. The old reason is California Institute of Technology's intention of building a 200- in. telescope in California, near Mount Wilson's 100-incher. Two factors delay Caltech: 1) Dr. Elihu Thomson of General Electric does not yet see his way toward making the necessary fused quartz disk which will be nearly as wide as a two-story building is high; nor has any other mirror-builder come forward with a sound plan for building the vast platter; 2) Caltech must wait...