664 REPORTS 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 

 eyer thought desirable to make observations in that iilane. 



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



C. A. Young. 



Tarrytown, Westchester County^ ]!^^ew York. 

 Private Observatory. 



Longitude from Washington, 12™ 4:7M6 E. 



Latitude, 41° 04' 21" K 



Authority for latitude and longitude : United States Coast Survey. 



Director: Charles H. Rockwell. 

 Instruments : 



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

 mounting, John Byrne ; aperture of objective, GJ inches ; magnifying 

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



Additional information : 

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

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

 added to the instruments mentioned in i^revious rei)orts. No other 

 changes. 



Troy, Rensselaer County^ New York. 

 Williams Froudfit Observatory. 



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



Latitude, 42o 43' 52" K. 



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. Eicketts. 

 Instruments : 



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

 ton; aperture, 2.5 inches; magnifying power, 60 diameters: {h') one 

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

 power, 30 diameters. 



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

 ture of objective, 3.5 inches ; magnifying i^owers of eye-pieces, 45 to 200 

 diameters. 



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

 Howard, Boston. 



