EErORTS OF ASTRO:,()MICAL OUSERVATniMKS. (\\\ 



{(1) SjU'ctroscopcs : hn<^v 9-prisin ("lauk spectroscope: seven piisin, 

 double acting (equivalent to L'J prisms), fitting eciuatoiial nientioneci 

 above. 



(/) Chronograpli : Bond's spring governor. 



{(j) Gloclis: one mean tinu- makers, U'J zschneidek c^- 1-^haten- 

 HOPER, connected with cljronograph : one sidereal; makers, I'tz- 

 SCHNEIDER & Mahler, of Munich, connected with chronograpli. 



(?) Miscellaneous : Comet seeker, aperture 3.G inches, mounted on 

 large tripod; small portable telescope, a])erture 3 inches ; zenith sector, 

 loaned by Coast Survey, aperture 4 inches ; full set of common metttoro- 

 logieal apparatus, including a recording barometer; sextant by Haudy. 

 of London. 



Observations during '^uk past year : 



(a) For time and latitude. 



{d) Class illustration on reversal of lines, and tor promineiu'cs. 



{i) Meteorological observations 3 times per day; sun-spot observa- 

 tions since September 1, 1879. 



Work proposed for the coming year (1881) : 



Similar work, with special attention to sun spots, prominence, &c., 

 and spectroscopic observations. 



Hastings, Westchester County, Xeu- Yorl: 



» 

 Private Observatory. 



Longitude from Washington, 12'" 42«.7 E. 



Latitude, 40° 59' 25" is\ 



Authority for latitude and longitude : Coast Survey. 



Director : Henry Draper. 



Assistant: A. Hofbaijer. 



Instruments : 



(&) Meridian transit instrument: makers, Stackpole & Brother: 

 aperture, 2 inches; magnifying power, 45 diameters. 



(c) Equatorial imtruments : one reHector, 28 inches aperture, made 

 by Henry Draper; (c') one refractor, 11 inches aperture, by Alvan 

 Clark & Sons, with photographic corrector. 



{d) Spectroscopes: 1 diffraction, 1 stellar photographic, 1 automatic, 



&c. 



(/) Chronograph : one made by Henry Draper. 



{(j) Clock: one mean time; maker, Howard. 



(/() Chronometers: one mean time; maker, iS^EGUS: one sidereal: 

 maker, Kegus. 



(i) Miscellaneous : Altitude and azimuth rellector of 15J inches aper- 

 ture. 



S. Mis. 31 41 



