342 



PROCEEDINGS OF THE AMERICAN ACADEMY 



" The difference in the action of the two planets is just balanced by 

 the difference in the corrections of the elements of Uranus in the two 

 theories. The corrections are given in the following table. 



Mr. Bond cominunicated an account of his recent observa- 

 tions on the great nebula surrounding ^' Orionis ; with draw- 

 ings ilhistrating its appearance as seen through the Cambridge 

 refractor. Of the resolution of parts of the nebula Mr. Bond 

 expresses himself with confidence. Several new stars are 

 added in the vicinity of the Trapezium, and the connection of 

 the nebulous districts about C and t Orionis with the great 

 nebula conclusively established. 



The paper was referred for publication in the Memoirs, as 

 was also a communication from Mr. G. P, Bond, on " Some 

 Methods of Computing the Ratio of the Distances of a Comet 

 from the Earth." 



Professor Agassiz made some remarks on the distinctive char- 

 acters of the family of Cyprinoids or suckers, as distinguished 

 from the Cyprinodons, and illustrated the remarkable difference 



