224 PROCEEDINGS OF THE AMERICAN ACADEMY 



with the family of the deceased in their bereavement; and that a copy 

 of these resolutions be transmitted to them, in token of respectful 

 condolence." 



These resolutions were unanimously adopted. 



The following gentlemen were elected Fellows of the 

 Academy : — 



Professor Henry L. Eustis, of Cambridge. 



Samuel L. Abbot, M. D., of Boston. 



S. Stehman Haldeman, Esq., of Columbia, Pennsylvania. 



The Council of Nomination reported certain nominations 

 for the list of Foreign Honorary Members. 



Three hundred and twenty-ninth meeting. 



March 5, 1850. — Monthly Meeting. 



The President in the chair. 



The Corresponding Secretary read a letter from S. S. Hal- 

 deman, Esq., of Columbia, Pennsylvania, signifying his ac- 

 ceptance of his election as a Fellow of the Academy. 



The Council reported a list of candidates, duly recom- 

 mended, to be ballotted for as Foreign Honorary Members at 

 the ensuing Annual Meeting. 



Mr. Teschemacher gave a brief account of a recent treatise 

 by James D. Dana, Esq., on the isomorphism and atomic 

 volume of minerals. 



Dr. B. A. Gould, Jr., gave a detailed account of a series of 

 experiments he had recently witnessed, made at Washington, 

 under the direction of the United States Coast Survey, by 

 means of the electric telegraph, which were thought to furnish 

 important data respecting the velocity of the electric current 

 through the wire. This gave rise to an animated discussion. 



Professor Peirce made some remarks on the theory of vi- 

 brating dams, and stated that these vibrations were beautifully 

 exhibited at the great dam just erected at Holyoke, upon the 

 River Connecticut. They were plainly not vibrations of the 



