REPORT.S OF ASTRONOMICAL OBSERVATORIES. 045 



Madison, Dane Counti/, Wisconsin. 

 The Washburn Ohscrvatori/. 



Longitude from Wasliingtou, 49'" 25\8 W. 



Latitude, 4,'P 4' ,3G".7 i^. 



Authority for latitude aud longitude : A pier of the I Tnited States 

 Coast and Geodetic Survey, about 500 feet from the obser\atory, has 

 been connected by a triangulation with the transit-room, and tlie posi- 

 tion given refers to the center of the transit circle. 



Director : Edward S. HoldeK , 



Assistants : S. AV. Burnham ; 

 G. C. COMSTOCK; 

 F. W. WiNKLEY. 



The main Observatory consists of a dome for the equatorial, which is 

 mounted, of a transit-room now ready for the Repsold circle, and of a 

 director's room. A library and additional rooms are now buikling, as 

 an east wing to the nuiiu building. A small student's observatory, built 

 by Professor Watson, contains a transit room for the Fauth transit, aud 

 a dome large enough for an 8-inch equatorial. The Watson Solar Ob- 

 servatory is still unfinished. The building will i)robably be finished 

 during the year. 



iNSTRiniENTS : 



The following will be ordered in 1881 : 



{a) A meridian circle: maker, Repsold & Brother, Hamburg; diam- 

 eter of circles, about 30 iuches; divided to 2'; read by 4 microscojjes to 

 1". Aperture of objective, 4.8 inches; for observations of the sun, a[)er 

 ture employed, — inches ; magnifying power ordinarily employed, — 

 diameters. 



The following instruments have been ordered : 



(h) Meridian transit instrument: makers, Fauth & Co., Washing- 

 ton; aperture, 3 inches; magnifying power, 00 and 120 diameters. This 

 will have two 12-inch circles divided on the edges: one circle to 10", 

 the other for setting only. The fine circle has a level for latitude. 



{c] Equatorial instrument: makers, Alvaj^ Clark cS: Sons; ajx-r- 

 ture of objective, 15.5 inches ; magnifying powers of eye-pieces, 145 to 

 1200. 



(/) Chronograph: a chronograph by Fauth & Co., with a couical 

 pendulum, is provided. 



{(j) CIocl-s : one mean time; makers, Seth Thomas Clock Company : 

 one sidereal ; maker, IIoiiwu, of Amsterdaiu. 



{h) Chronometers : one sidereal, maker. Bliss, Xo. 2780; one sidereal 

 break-circuit. Bliss, Ko. 2791. 



Observations during the past year (from Jaiuiary. 1880, to 

 . January, 1881): 



(c) A coast survey transit (since removed) was used in the prime ver- 



