The geography of the heavens, and class-book of astronomy: accompanied by a celestial atlas (1873)
Burritt, Elijah H. (Elijah Hinsdale), 1794-1838, Mattison, Hiram, 1811-1868, ed, Whitall, Henry, 1819-1887? Celestial planisphere · New York, Sheldon & company · leaf 326
id downin Dicks Practical Astronomer, as evidence of a good instru-ment, with perfect ease. Under favorable circumstances, itshows the sixth star in the trapezium of Orion, and to showPolaris double is a very easy test indeed. A Fincltr is seen attached to the lower end of the large instrument It… … THE PHILADELPHIA BErEACTOE.* 697. This instrument is located in the Observatory of the HighSchool of Philadelphia, Its focal length is eight feet, and itsaperture six inches—the same as the one on the preceding page.It was made by Merz <fc Mahler, of Munich, and cost $2,200. * We are indebted to…
Constellations · Stars
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