139 



Address delivered before the Young Men's Mercantile Library 

 and Mechanics' Institute of Pittsburgh. By Solomon W. Roberts, 

 Civil Engineer. February 8, 1850. Pittsburgh. 8vo. — From 

 the Author. 

 Report of the Committee of the Overseers of Harvard College, ap- 

 pointed to visit the Lawrence Scientific School, in 1849. Cam- 

 bridge, 1850. 8vo. — From an Anonymous Donor. 



Professor Kendall reported the observations of the occulta- 



tion of Jupiter and his Satellites, made on the 26th February, 



1850, at the High School Observatory. 



Mean Time. 

 h. ra. s. 



Immerson of Jupiter's I limb, - - 14 



,, II ,, • - 14 



Emersion of the 3d Satellite, - - 15 



„ Jupiter's I limb, - - ] 5 



J? ?? II 55 ■ ■ 15 



„ 1st Satellite, - - 15 



4th „ - - 15 



Prof. K. referred to the striking difTerence between the brilliancy 

 of the moon and that of the planet. He was prepared to see a marked 

 difference, but the contrast at the moment of the contact of the planet 

 with the moon's bright limb, was much greater than he had an- 

 ticipated. 



He reported further, that the expedition sent out to South 

 America by the government of the United States, to determine 

 the parallaxes of the planets Mars and Venus, had established 

 their observatory at Santiago, in Chili. The observations 

 were going on under most favourable circumstances. Similar 

 observations were made at Washington, officially connected 

 with those in South America. 



Pending nominations, Nos. 232 to 237, and new nomina- 

 tion, 238, were read. 



19 



0.96 



20 



54.16 



15 



26.68 



19 



52.14 



21 



42.14 



22 



34.70 



34 



7.21 



