K£PORTS OF ASTRONOMICAL OBSKRVATOKIKS. G39 



eluding the occultations of b Opliiuclii by the partially-eclipsed moon, 

 and of (f Ophiuchi by the totally-eclipsed moon. 



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

 lNrovem"ber 7. 



4. Close approaches of planets to prominent stars. 



Georgetown, District of Cohnnhia. 

 Ohservatonj of Georgetown College. 



Longitude from Washington, GM-* W. 

 Latitude, 38° 54' 26".2 :^f. 

 Director: (?) 



Glasgow, Howard County, Missonri. 

 Morrison Observatory. 



Longitude from Washington, 1^ 3-" 5^93 W. 



Latitude, 39° 10' 16".75N. 



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. 



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

 2. C. W. Pritchett, jr. 



INSTRUjNIENTS : 



(a)31eridian circle: one; makers, Troughton & Snois; 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, 12i inches; magnifying powers of eye-pieces, oi) to 1-00. 



(/) Chronograph: one. 



(a) CiocA;: sidereal; maker, CHARLES FRODSHAM, London. 



//) Chronometer : sidereal; maker, T. S. & J'. D- Kegus, ^ew loilc 

 \i) Miscellcmeous: Alt-azimuth, by L. P. Casella, Loudon; comet- 

 seeker, by ALVAN Clark & Sons. 



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



to January 1, 1881) : f,-^ ^nri- de- 



(a) Observations for time; comparison stars; systematic Mork de 



'TwJrObtvations of double stars; micrometric measures of pairs 

 spicillly needing observations; observations of planets and comets. 



