He took a position at Allegheny Observatory, and later went to Lick Observatory.

The main active research pursuit at the Allegheny Observatory involves detections of extrasolar planets.

When the new Allegheny Observatory was designed it was done so with the public in mind, the floor plan included a lecture hall.

She used to work at the Allegheny Observatory, but she gave it up to have Cally.

From 1913 to 1915 she worked at the Allegheny Observatory in Pittsburgh.

Beginning in 1930, Wagman was associated with Pittsburgh's Allegheny Observatory.

He worked at the Allegheny Observatory from 1878 until 1895.

In 1898 he became director of the Allegheny Observatory in Pittsburgh, continuing in this post until 1900.

In 1920 he was appointed director of the Allegheny Observatory.

His article describing the device appears in the Publications of the Allegheny Observatory, vol.