E£,PORTS OF ASTRONOMICAL OBSERVATORIES. G39 



eluding the occultations of h Opbinclii by the partially-eclipsed moon, 

 and of c2 Ophiuchi by the totally-eclipsed moon. 



3. The first and second contacts at ingress of the transit of Mercury, 

 November 7. 



4. Close approaches of planets to prouiiuent stars. 



Georgetown, Bi.sfrict of Columbia. 

 Observatory of Georgetown College. 



Longitude from Washington, G\2 W 

 Latitude, 38^ 54' 26".2 N. 

 Director : (?) 



Gla^jgow, Howard County^ Missouri. 

 Morrison Observatory. 



Longitude from Washington, l'' 3'" 5^93 W. 



Latitude, 39° IC 1G".75 N. 



Authority for latitude and longitude : Longitude, exchange of clock 

 signals with the Naval Observatory in June and July last, 5 nights. 

 Latitude, from circumpolar stars observed on meridian circle. 



Director: C. W. Pritchett. 



Assista7iis : 1. H. S. Pritchett, in charge of meridian circle. 

 2. C. W. Pritchett, jr. 

 Instruments : 



(a) Meridian circle: one; makers, Troughton & Simms; diameter 

 of circles, 24 inches; divided to 5'; read by 4 microscopes to 1" ; aperture 

 of objective, 6 inches; for observations of the sun, aperture employed, 

 4 inches ; magnifying power ordinarily employed, 200 diameters. 



(c) Equatorial instrument: makers, Alvan Clark & Sons; aperture 

 of objective, 12^ inches; magnifying powers of eye-pieces, 50 to 1200. 



(/) Chronograph: one. 



(g) Clock: sidereal; maker, Charles Frodsham, London. 



{h) Chronometer : sidereal; maker, T. S. & J. D. Negus, New York. 



(*) Miscellaneous: Alt-azimuth, by L. P. Casella, London; comet- 

 seeker, by Alvan Clark & Sons. 



Observations during the past year (from January 1, 1880, 

 to January 1, 1881): 



(a) Observations for time; comparison stars; systematic work de- 

 ferred for a time. 



(c) {&) Observations of double stars; micrometric measures of pairs 

 specially needing observations ; observations of planets and comets. 



