Kenwood Astrophysical Observatory

Kenwood's principal instrument was a twelve-inch refractor, which was used in conjunction with a Rowland grating as part of the spectroheliograph.

Hale hired Ferdinand Ellerman as an assistant; years later, the two would work together again at the Mount Wilson Observatory.

The 12-inch telescope was one of the instruments besides the large 40-inch aperture refractor for the start of Yerkes observatory in the 1890s.

[3] The 12-inch refractor is noted as being moved to the north dome of the Yerkes observatory, but was eventually replaced by a 24-inch reflector telescope.

[4] The 12 inch refractor was a double telescope with one for visual observation and another objective for astrophotography,[5]