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In 1887 Grubb's firm built seven normal astrographs for the Carte du Ciel international photographic star catalogue project, 13-inch refracting telescopes all designed to produce uniform photographic plates.
The facilities include a 24-inch Boller and Chivens reflector with a CCD and retrofitted with a DFM control system, a 12" Fitz/Clark refractor, a 6" Alvan Clark refractor, a Hale Spectrohelioscope, and six Meade 8" SCTs.
These observations were made with a spectrograph attached to the 13-inch Fitz-Clark refracting telescope at Allegheny Observatory.
In Boston, he met with Alvan Clark and purchased an 18½-inch lens and mounting for the Dearborn Observatory, at the time, the largest refracting telescope ever built.