Warner & Swasey Co.

Summer view of Lick Observatory, 1915

Winter views of Lick Observatory, 1915

One of four photographs showing the equatorial mounting for the 40-inch Yerkes refracting telescope

One of four photographs showing tailpiece and controls for the 40-inch Yerkes refracting telescope

Summer and winter views of Lick Observatory, 1915

Two photos on one mount of the U.S. Naval Observatory at Washington

Photograph of the 40" Yerkes telescope

Photograph of the 36" Lick telescope

4 photographs of 40-inch Yerkes refracting telescope, at Williams Bay

Photograph of Yerkes Observatory at Williams Bay

One of two photographs on separate mounts of the U.S. Naval Observatory

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