44 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



<lutics of teaching that I have little or no time for special work; 

 and even if 1 had, we are not yet equipped fully enough for pursu- 

 ing any special investigations. I look forward, however, to some 

 special work in the direction of solar physics. 



Our principal instruments are an Equatorial Telescope, with a 6.4- 

 inch object-glass, 9 feet focal length; a Transit Instrument with 2.2- 

 inch object-glass and 30 inches focal length; a Negus Break-circuit 

 Chronometer; and meteorological instruments. 



Our work has been confined almost entirely to keeping correct 

 time, and to the usual meteorological observations. The only pub- 

 lication during the year was a pamphlet of 36 pp., by myself, on 

 " Our Present Knowledge of the Sun." 



Morrison Observatory, Glasgow, Mo. 



Professor C. W. Pritchett, Director. 



The Morrison Observatory was founded at my request, in connec- 

 tion with Pritchett School Institute, by Miss Berenice Morrison. She 

 has already donated to the observatory $50,000, and an equal sum 

 to Pritchett School Institute. I am now assisted by my son, Henry 

 S. Pritchett. 



The observatory building has an eligible site half a mile east of 

 the college, and was completed in 1876. It has a front on the south 

 of sixty-five feet. On the east is the Equatorial Room, of brick, cir- 

 cular on the inside. The entire dome, twenty-four feet in diameter, 

 is easily revolved by a moderate pressure of the hand on a system 

 of wheel-work. The circular shutters are in four sections, and are 

 readily raised or lowered by a system of gearing, working two pairs 

 of endless chains. The centre of the pier for the Equatorial is twenty 

 inches south of the centre of the dome, so as to bring the centre of 

 motion of the instrument to the centre of the sphere. 



The Transit Room a strong frame building is directly west of 

 the Equatorial. 



The Library and Work Room is directly west of the Transit Room, 

 and is separated from it by a hall. 



Instruments. The Equatorial, by Alvan Clark and Sons, was 

 mounted in December, 1875. The objective is 12 inches in aper- 

 ture, and focal length 17 feet. It is furnished with Finder, Automatic 

 Movement (very simple and regular), Filar-position Micrometer, and 

 a range of power from 50 to 1200. Its cost in the shop was $6000 in 

 gold. Its performance has proved very satisfactory. 



Trantit Circle, by Trougiiton and Simms, of London, was mounted 

 in June, 1ST7. The objective is 6 inches, and focal length 82 inches. 

 Its Btyle of mounting is similar to that of the new Transit Circle of 

 Harvard College Observatory. 



