210 HISTORY OF ASTRONOMY. 



half feet, was presented to Williams College by the late 

 Amos Lawrence, Esq., of Boston. The optical part was 

 manufactured by Mr. Clark, of Boston, and the mounting 

 was furnished by Phelps. The instrument is mounted 

 equatorially, and has a clock movement. It will afford 

 some indication of the excellence of this instrument to 

 state that the sixth star in the trapezium of Orion has 

 been seen by it. This telescope has been mounted under 

 the dome of the observatory in place of the former re- 

 flecting telescope. 



HUDSON OBSERVATORY, OHIO. 



The next experiment for an observatory was made in 

 Ohio, in connection with the Western Beserve College. 

 Having been elected to the professorship of mathematics 

 and astronomy in this institution in the spring of 1836, 

 the writer was sent to Europe for the purchase of instru- 

 ments and books, and returned in the autumn of 1837 

 with an equatorial telescope, a transit circle, and a clock, 

 During the next season a building was erected, which, 

 though quite moderate in dimensions, was well suited to 

 the accommodation of the instruments. The entire length 

 of the building is 37 feet, and its breadth 16 feet. The 

 transit room is 10 feet by 12 upon the inside, having a 

 sandstone pier in its center. The pier is entirely detached 

 from the building, and descends about six feet below the 

 surface of the earth. The transit commands an unob- 

 structed meridian from ninety degrees zenith distance on 

 the south, to eighty-nine on the north. 



