History of Science Museum: Collection Database Search


Refracting telescopes

The refractors in the Orrery Collection are particularly interesting on account of their size and early date; not many telescopes have survived from this period. Two [1, 2] have pasteboard tubes covered with vellum with gold tooling, and one of these [2] has been signed by John Marshall, who also made the microscope on the top shelf. The object-glass in one of the wooden telescopes [3] is signed by James Wilson, the likely maker of the pocket microscope on the middle shelf, and the eyepiece micrometer [5], used for measuring angular distances within the field of view, could be fitted to the longer telescope [4]. It is probably the earliest surviving eyepiece micrometer.

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