282 



London, Oct. 17, 1855, accompanying its Proceedings, Nos. 214 

 to 291 ; from the Societe d'Agriculture de Lyon, June 23, 1855, 

 transmitting a copy of its Annals, Vol. 6 ; from the Bayerische 

 Akademie der Wissenchaften, July 12, 1855, and the Naturhis- 

 torischer Verein at Bonn, August 15, 1855, accompanying 

 donations of their publications. 



Mr. Chas. J. Sprague presented a Lichen which he had 

 found in Hinghain and Newton, Mass., and which had been 

 pronounced by Rev. Dr. M. A. Curtis, of South Carolina, 

 to be Myriangiwn Curtisii of Berk, and Mont. It had not 

 before been detected in Massachusetts. 



R. D. Mussey, Jr., Esq., of Cincinnati, was elected a 

 Corresponding Member. 



December 19, 1855. 

 The President in the Chair. 



A communication was received from the Kongelige 

 Danske Videnskabernes Selskab, June 6, 1855, returning 

 thanks for the Annual Address by the President. 



Prof. W. B. Rogers presented the following table of the 

 terminal velocities of rain-drops, as a substitute for that 

 previously handed to the Secretary, (Vide page 267,) 

 which by mistake had been copied from an unfinished 

 calculation. The present table includes, in addition, the 

 case of vesicular drops, such as have been supposed to 

 form cloud or fog. 



Diameter. Terminal Velocity in feet per second. 



iV inch .... 20.55 ft. 

 ^V " . . . . 14.53 



