CG4 REPOETS OF ASTRONOMICAL OBSERVATORIES. 



There is no instrument in the prime vertical room (which is used 

 mainly as a waiting-room or for recitations), but it is provided with a 

 pier and shutter, so that the meridian circle can be set up there if it is 

 eier thought desirable to make observations in that plane. 



The building and its equipment have cost not far from $10,000. 



C. A. YouNa. 



Tarrytown, Westchester County, New York. 



Private Observatory. 



Longitude from Washington, 12™ 47M6 E. 



Latitude, 41° 04' 21" N. 



Authority for latitude and longitude: United States Coast Survey. 



Birector: Charles H. Eock"\vell. 



Instruments : 

 (c) Equatorial instrmnent: makers, — glass, Dr. C. S. Hastings; — 

 mounting, John Byrne ; aperture of objective, G^ inches; magnifying 

 powers of eye-pieces, GO, 112, 170, 243, 327, 409, 751. 

 Additional information : 

 The equatorial has been mounted in a new observatory 12^ feet diam- 

 eter of dome. A chronodeik for equal altitude observations has been 

 added to the instruments mentioned in previous reports. No other 

 changes. 



Troy, Rensselaer County^ New Yorlc. 

 Williams Froudjit Observatory. ' 



Longitude from Washington, 13™ 27^.5 E. (nearly). ' 



Latitude, 42° 43' 52" I:^. 



Authority for latitude and longitude : Latitude determined by obser- 

 vations with the zenith telescope ; longitude by electro -magnetic signals 

 from United States Naval Observatory. 



Director : Professor Dascom Greene. 



Assistant: Palmer C. IIicketts. 

 Instruments : 



(b) Meridian transit instruments: one made by E. Kubel, Washing- 

 ton; aperture, 2.5 inches; magnifying power, GO diameters: {b') one 

 made by Phelps & Gurley, Troy; aperture, 2 inches; magnifying 

 power, 30 diameters. 



(c) Equatorial instrument: maker, Henry Fitz, New York; aper- 

 ture of objective, 3.5 inches; magnifying powers of eye-pieces, 45 to 200 

 diameters. 



io) Clocks: one mean time; maker, Stokell, New York; one by 

 Howard, Boston. ' 



