Washington : its public and private edifices, interiors, monuments, and works of art ; a collection of superior engravings on wood (1881)
Washington : [s.n.] · leaf 68
The Observatory, under the direction of the Navy Department, was founded in 1842, and to-day in work ranks among the first. The Equatorial Telescope is the largest refractor in the world, the object glass measuring 26 inches. The Botanical Garden, commenced in 1850, contains one of the finest…
Washington (D.C.) -- Pictorial works
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.