448 PROCEEDINGS OF THE AMERICAN ACADEMY. 



"A Revision of the Endogoneae." By Roland Thaxter, 



" The Echinoderms of the Challenger Bank, Bermuda." By- 

 Hubert L. Clark. Presented by E. L. Mark. 



"The Heat of Vaporization of Mercury." By F. W. Loomis. 

 Presented by P. W. Bridgman. 



"The Joule-Thomson Effect in Air." By P. H. Royster. Pre- 

 sented by P. W. Bridgman. 



"The Ratio of the Calorie at 73° to that at 20°." By Arnold 

 Romberg. Presented by P. W. Bridgman. 



The Meeting was then dissolved. 



One thousand one hundred and fifteenth Meeting. 



May 10, 1922. — x\nnual Meeting. 



The Academy met at its House at 8.15 p.m. 



The President in the Chair. 



Thirty-seven Fellows were present. 



The Transactions of the Meeting of April 12 were read and 

 approved. 



Professor J. R. Jewett was appointed a delegate to represent the 

 Academy at the celebration of the 100th anniversary of the Societe 

 Asiatique de Paris, July 10-13, 1922. 



The Corresponding Secretary reported that the Council had 

 transferred William Emerson, with his consent, from Class I., 

 Section 4 to Class HI., Section 4. 



The Corresponding Secretary presented the following biographi- 

 cal notices: — Joel Asaph Allen, by H. C. Bumpus; Eliot Channing 

 Clarke, by G. F. Swain; Henry Lee Higginson, by M. A. DeW. 

 Howe; Franklin Paine Mall, by W. T. Councilman; John Elliot 

 Pillsbury, by W. H. Dall; Elmer Ernest Southard, by C. M. 

 Campbell; Andrew Dickson White, by W\ D. Bancroft; Edward 

 James Young, by W'. W. Fenn. 



The following report of the Council was presented: — 



Since the last report of the Council, there have been reported the 

 deaths of seven Fellows: Joel Asaph Allen, Charles Leonard 

 Bouton, Charles Pickering Bowditch, Eliot Channing Clarke, 



