ASTRONOMY. 5 ] 



2d. A series of 450 observations with zenith telescope, for latitude, 

 made on sixty pairs of stars. A preliminary determination of the 

 latitude from 182 of these observations gives 40 36' 23.75" N. 



3d. A series of micrometrical measurements of the position of 

 Mars during the recent opposition for parallax determination. 



It is intended to publish the foregoing in the form of a pamphlet, 

 which, I hope, will appear before the end of 1877. 



There is no especial provision given for regular astronomical 

 work. Such as I undertake is on my own responsibility, and in 

 addition to the work of instruction. The only assistance in that 

 direction is such as I can get from my pupils. 



Our instruments are : A 6-inch Equatorial, by Alvan Clark and 

 Sons ; a Zenith Telescope, by Blunt ; a Field Transit, by Stackpole ; 

 a Sidereal Clock, by Bond and Sons. 



Observatory of Vassar College, 



Miss Maria Mitchell, Director. 



First. The personnel of the observatory is confined to myself. I 

 have the aid, however (and it is often very valuable), of volunteer 

 work by my students. 



Second. The instruments of the observatory are : An Equatorial 

 Telescope, of 13 inches aperture, the glass of which has been re- 

 ground by Alvan Clark, and is very good ; a Meridian Instrument, 

 by Young, of Philadelphia, the aperture 3f inches (adapted to this 

 are two Collimating Telescopies, by Clark and Sons, of Cambridge) ; 

 a Sidereal Clock and Chronograph^ by Bond and Sons, Boston. The 

 observatory has also the use of several portable telescopes, photo- 

 graphic apparatus, etc., but they are private property. 



Third. Photographs of the sun are taken every fine day, and have 

 been for several years. 



Observations with the Equatorial are made on the planets Jupiter 

 and Saturn, with measurements, whenever the weather is suitable. 



Observations for Time. These observations it is proposed to con- 

 tinue during the coming year. 



Hopkins Observatory, Williams College, Williamstown, Mass, 



Professor T. H. Safford, Director. 



The personnel of this observatory consists of the director and two 

 students. 



The main instruments are a 7|~inch Clark Equatorial, of ancient 

 date, and a 3^-inch Siaims Transit, with Clock, by Moltneux and 

 Cope. Observations for a year past have been such as were needed 

 for teaching the undergraduates and makiug myself acquainted with 



