280 HISTORY OF ASTRONOMY. 



ing to two seconds of time, and the declination circle to 

 twenty seconds of arc. It is also furnished with clock- 

 work and micrometer. iThe crown-glass was obtained 

 from Bontemps, of Birmingham, England, and the flint- 

 glass was obtained from Paris. The price of this tele- 

 scope was $6000, and its performance has proved entirely 

 satisfactory. The entire cost of the building and instru- 

 ments was about $17,000. 



Dr. F. Briinnow, an astronomer well known by his 

 observations while connected with the observatory of 

 Berlin, and also by his Treatise on Spherical Astronomy, 

 has been appointed director of this observatory, and has 

 already entered upon his duties. We congratulate the 

 University of Michigan in having secured the services of 

 so skillful and learned an astronomer ; and we anticipate 

 that the career of Dr. Briinnow will shed luster upon 

 his adopted country, while he contributes to the promo- 

 tion of that science to which his life has been devoted. 



CLOYERDEN OBSERVATORY, CAMBRIDGE, MASSACHUSETTS. 



The great telescope belonging to Shelby College was 

 temporarily loaned to Professor Joseph Winlock, and 

 was removed to Cambridge, Massachusetts, where tem- 

 porary accommodations were provided for it, and this 

 establishment is known by the name of Cloverden Ob- 

 servatory. This consists of a circular wooden building, 

 with a revolving dome, fifteen feet in diameter, and a 

 small adjoining room for other instruments. The dome 

 is very light, consisting of a wooden frame covered with 



