10 



Franklin Institute; Anierican Chemist; American Institute 

 of Mining Engineers ; Department of the Interior, U.S. ; and 

 Mr. G. R. Crotch, of Cambridge, Eng. 



The Committee to which was referred the paper of Prof. 

 Cope, entitled, "Supplement to the Extinct Batracbia," &c., 

 reported in favor of its publication in the Transactions ; 

 which, on motion, was so ordered. 



The death of Dr. Wm. Proctor, February 10th, at Phila- 

 delphia, aged 57, was announced by the Secretary. 



Dr. Cresson exhibited the action of Thompson's Calori- 

 meter, and stated the close coincidence of its results with 

 those obtained by trial trips on the Pennsylvania Railroad. 

 Dr. Cresson exhibited the triangular piece of galvanized 

 iron, once the pinnacle of a cowl on the roof of a building 

 struck with lightning. The point had been melted and 

 elongated upwards and inclined towards an approaching 

 cloud, into which the discharge from the earth through the 

 building took place. 



The minutes of the last meeting of the Board of Officers 

 and Members in Council were read. 



Pending nominations IsTos. 745, 746, 747 were then read. 

 Mr. Fraley reported that he had received the last quarterly 

 interest on the Michaux legacy, due January 1st, through 

 Drexel and Co. 



Mr. Price reminded the Society that half of the interest 

 is appropriated by act of the Society to the planting of the 

 Michaux grove. During 1873 about $300 has been spent in 

 setting out about 100 foreign varieties of oak procured by 

 Prof. Cresson. 



Dr. LeConte suggested the future planting of such trees 

 within the Zoological Grounds. 



Dr. Horn stated that many of the foreign trees had already 

 succumbed to the attacks of native parasites, two varieties 

 of larvee having been submitted to his inspection by the 

 Chief of Park Police. 



Dr. LeConte, referring to the well known fate of our 

 foreign sycamores and lindens, urged the necessity of plant- 



