refracting telescope (from "Smith's Illustrated Astronomy" 1848).]]
The 1845 Merz und Mahler 11 inch refractor – Housed in the "Mitchel Building". May be the oldest continually used telescope in the world. It is currently used for public education programs.
The 1904 Alvan Clark & Sons 16 inch refractor – Housed in the "Herget Building". Used in public education programs and graduate research.

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