129 



Specimen of the Transfer Process invented by Joseph Dixon of Taun- 

 ton, Massachusetts. Boston, 1839. — From the Author. 



Mr. S. C. Walker, in behalf of the Committee on the paper 

 entitled, "Astronomical Observations made at Hudson Obser- 

 vatory, &c. by Elias Loomis, Professor of Nat. Philos., &c. in 

 the Western Reserve College, Hudson, Ohio," made the fol- 

 lowing report: — 



The memoir of Prof. Loomis contains a description of the Hudson 

 Observatory, erected at the expense of the Western Reserve College, 

 at Hudson, Ohio. The building consists of a central portion, fifteen 

 feet square upon the inside. From a circular platform of ten feet 

 diameter, rise twelve small cherry columns, that sustain a hemis- 

 pheric dome of nine feet internal diameter, covering a five and a half 

 feet equatorial of 3.8 inches aperture, by Simms. The dome rotates 

 on ten lignumvitse wheels of five inches diameter. The equatorial 

 rests on an insulated pier, descending six feet below the surface of the 

 ground, and rising three feet above the platform, which is, itself, 

 about six feet above the surface of the ground. 



The eastern wing is ten feet by twelve, and seven and a half feet 

 high, and covers a Simms' transit circle of eighteen inches diameter, 

 graduated on platinum to 5', and reading to single seconds by three 

 Troughton's microscopes. The telescope has a focal length of thirty 

 inches and an aperture of 2.7 inches. The transit circle, and a 

 clock by Molyneux are each mounted on separate insulated piers. 

 The western wing contains no instruments; but serves for a lodging- 

 room, computing-room, &c. 



Prof. Loomis gives the following results for the latitude of the Hud- 

 son Observatory. 



By u. c Polaris, 



Aug. 8, Latitude 41 14 39.8 



10, 36.7 



13, 36.8 



14, 37.8 



15, 40.8 

 17, 36.6 



mean 41 14 38.1 



