REPORTS OF AMERICAN OBSERVATORIES. 575* 



I. Personnel: 



Director, General II. L. Abbot, Corps of Engineers. 

 Assistants : Capt. A. M. Miller, Corps of Engineers, and officers on 

 duty with the battalion of engineers. 



II. Instruments : 



(b) Meridian transit instruments : Maker, Troughton; focal length , 

 30 inches; aperture, 2 inches; Russian transit, Stackpole & Bro.; 

 focal length, 31 inches ; aperture, 2} inches ; combined transit, and zenith 

 teloscope, Wurdemann; focal length, 30 inches; aperture, 2.1 inches. 



(c) Equatorial instruments: Maker, Tulley; portable; focal length, 

 65 inches ; aperture of objective, 3.8 inches; magnifying powers of eye- 

 pieces, 50 to 200 ; mounted on tripod with Smeato^ ? s block. 



(el) Spcctroscojyes : 1 ; Chemical. 



(/) Chronographs: Field pattern, made by Negus. 



'(//) Chronometers : Meantime; makers, Arnold & Dent (1). Side- 

 real ; makers, Bond & Son (2); both with Negus break-circuit arrange- 

 ment. 



(i) Miscellaneous : 1. Zenith telescope, made by Wurdemann, of latest 

 pattern; magnifying power, 80 diameters; 2 Stackpole & Bro. sex- 

 tants: 1 portable field transit, by Stackpole & Bro.; focal length, 24 

 inches ; aperture, 2 inches. 



III. Observations during the past year : 



The object of the observatory is the instruction of junior officers of 

 engineers on duty at the engineer school of application in practical fieM 

 astronomy, such as they may be called upon to practice on boundary 

 geodetic surveys. The work has been directed accordingly. 



IV. Work proposed for the coming year : 

 As above. 



Location of observatory : (City) Ypsilanti; (County) Washtenaw; 

 (State) Michigan. 

 Name of observatory : Michigan State Normal School. 



Longitude from Washington, 0° 32' 30" west. 

 Latitude 42° i;;/. 

 Authority for latitude and longitude: J. C. Watson. 



I. Personnel: 



Director, Lewis McLouth, M. A. 



II. Instruments : 



(b) Meridian transit instruments: Maker, GURLEY, Albany ; aperture, 

 IS inches; magnifying power, 30 diameters. 



(c) Equatorial instruments ; Maker, A. CLARK, Cambridgeport, Mass; 

 aperture of objective, 4 inches; magnifying powers of eyepieces, 45,90, 

 144, 210. 



