PROCEEDINGS 



THE ROYAL IRISH ACADEMY. 



1842. No. 33. 



January 21. 



Rfv. HUMPHREY LLOYD, D. D., Vice-President, in 

 the Chair. 



Resolved, — On the recommendation of Council, — That 

 it shall be the duty of the Committee of Pubhcation to report 

 on Papers intended for publication in the Transactions. 



Resolved, — On the recommendation of Council, — That 

 the Treasurer be authorized to sell stock of the Academy to 

 the amount of £300, for payment of the Printer's bill and 

 other arrears. 



The Rev. Charles Graves, F. T. C, D., read a paper " on 

 the Motion of a Point upon the Surface of a Sphere." 



When the motion of a material point is limited to a given 

 plane, the circumstances of its motion are commonly investi- 

 gated by means of the equations, 



xdt^ = d^x, Ydf = d^y, 



X and y being rectangular coordinates in the given plane. 

 Mr. Graves shows that, in like manner, the motion of a ma- 

 terial point, constrained to move on the surface of a sphere, 

 whose radius = 1, may be discussed by means of the similar 

 equations, 



VOL. 11. s 



