Prototype beam splitter for the Advanced Laser Interferometer Gravitational Wave Observatory (aLIGO) 2008 (prototype)
Heliostat with spring driven clock drive for use with table top spectrometers by Adam Hilger Ltd. 1919
Hand held solar viewer with dark glass filter and lignum vitae wood mount and turned handle 1750-1799
English boxwood Gunter quadrant, by Bate (4 1/2-inch radius) English horary quadrant, 1750-1799 1750-1799
Circular glass planar lens marked as Field lens used by prof. Plaskett at the University Observatory 1935-1955
Copernican armillary sphere from set of two armillary spheres and a celestial globe constructed in paper on pasteboard 1807-1846