One of two cases for a three prism spectroscope by Howard Grubb

Model of a cylindroid, 1895-1900

Twin reflecting and refracting telescopes on observatory mounting, 1885

Lancaster's Patent Watch Camera

Grubb Sector microscope

Three prism solar spectroscope with automatic prism adjustment and a fixed equatorial mounting with drive by Grubb

Two 6-inch aperture refracting telescope extension tubes, with mahogany case

6-inch aperture for refracting telescope object glass, in wooden case

Set of eyepieces, for 6-inch aperture refracting telescope, in mahogany box

Accessories for Solar Spectroscope

Refracting telescope with observatory mounting, 1884

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