2T5 



February 12TH5 1849. 



REV. HUMPHREY LLOYD, D. D., President, 

 in the Chair. 



Maurice Colles, Esq.; Rev. John Magrath, LL. D. ; Jere- 

 miah J. Murphy, Esq. ; and William Ogilby, Esq. ; were 

 elected Members of the Academy. 



Mr. M. Donovan continued the reading of his paper on 

 electricity. . 



Sir William Betham read a paper on the feudal land te- 

 nures and dignities, and their introduction into Ireland at the 

 English conquest. 



The Rev. Charles Graves, on the part of the Rev. Brice 

 Bronwin, presented a paper on the theory of planetary dis- 

 turbance. 



Mr. J. Neville read a paper on the maximum amount of resist- 

 ance acting in any 

 direction required 

 to sustain banks of 

 earth or other ma- 

 terials, with slo- 

 ping tops and faces, 

 and the eflfects of 

 friction between the 

 face of the bank and 

 the back of a re- 

 taining structure. 



IfCDEbeany 

 bank with a slop- 

 ing face CD, and a sloping top, DE ; CE the position of the 



