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For example, Hartsoeker disavows the contemporary position (e.g. of Robert Hooke) that with refractor telescopes one soon would be able to see man-sized creatures on the moon, if any in fact existed.
Between 1847 and 1852 Whipple and astronomer William Cranch Bond, director of the Harvard College Observatory, used Harvard's Great Refractor telescope to produce images of the moon that are remarkable in their clarity of detail and aesthetic power.
The observatory formerly included a twelve inch (30 cm.) refractor telescope built by the Alvan Clark firm in 1916 for the Czarist government of Russia.