285 



General Therapeutics and Materia Medica. With one hundred and 

 twenty Illustrations. Adapted for a Medical Text Book. By 

 Robley Dunglison, M.D. Third Edition, revised and improved. 

 In Two Volumes. Philadelphia, 1846. 8vo. — From the same. 



Prof. Henry laid before the Society the results of some in- 

 vestigations that he had lately made in physical science, and a 

 theory of the causes of the phenomena observed. The well 

 known phenomenon of a ball resting on a jet of water, he as- 

 cribed to the action of three different causes — 1st. To the ad- 

 hesion of the water to the ball. 2d. To the adhesion of the 

 water to itself. 3d. To the tendency of water to move in a 

 straight line, and also to the principle of action and reaction. 

 He had also made experiments in regard to the interference of 

 heat, for the purpose of discovering whether certain pheno- 

 mena of interference of light were exhibited as well in the 

 case of caloric. He found it to be so, and that two rays of 

 heat may be thrown on each other, so as to produce a reduc- 

 tion of temperature. 



The Society then proceeded to an election of members. 



Dr. Patterson, from the Committee of Finance, reported the 

 liquidation of the debt of the Society to the estate of the late 

 Nathan Dunn. 



All other business of the evening having been concluded, the 

 ballot boxes were opened, and the following gentlemen de- 

 clared to be elected members of the Society: — 



Richard L. M'Culloch, of Philadelphia. 



Ceva Grimaldi, Marquis of Pietracatella, of Naples. 



Stated Meeting, November 6. 



Present, twenty-nine members. 



Dr. Chapman, President, in the Chair. 



Mr. R. L. M'Culloch, a newly elected member, was intro- 

 duced, and took his seat. 



Letters were received and read : — 



From the Royal Society of Sciences of Copenhagen, dated 



