226 [April, 1845. 



Memoire sur l'equilibre des colonnes. 



Memoire sur quelques transformations generates de 1 'equa- 

 tion fondamentale de la mecanique. (2 exemplaires.) 

 (Extrait du tome XII des memoires de l'Academie royale 

 de Bruxelles.) 



Memoire sur l'equilibre d'un corps solide suspendu a un 

 cordon flexible. (Extrait du tome X des memoires de l'Aca- 

 demie royale de science et de Belles lettres de Bruxelles.) 



Note sur l'equation A B =C. (Extrait du tome XI des memoires 

 de l'Academie royale de Bruxelles.) 



Note sur l'equilibre d'un systeme dont une partie est sup- 

 posee inflexible et dont l'autre partie est flexible et ex- 

 tensible. 



A note was read from the Baron van der Staaten Ponthoz, 

 Secretary of the Belgian Legation at Washington, dated 25th 

 March, 1845, transmitting the works of M. Pagani, above 

 mentioned. 



A letter was read from Mr. John L. Le Conte, dated 

 New York, March 24th, 1S45, acknowledging the receipt of 

 his notice of election as a Correspondent. 



A letter from the Asiatic Society of Bengal, dated 1st Oct., 

 1844, announcing the presentation to the Academy by that 

 Society of 2S volumes of Oriental works, printed wholly, or 

 in part, under its auspices ; and enclosing a list of the same. 



A communication from the Rev. Daniel Ziegler, dated 

 York, Pa., March 13, 1845, transmitting a paper intended for 

 publication, entitled "Descriptions of new North American 

 Coleoptera ;" which latter was on motion referred to the fol- 

 lowing committee: Dr. B. H. Coates, Dr. McMurtrie and 

 Mr. Markland. 



