The Academy of Natural Sciences 15 



declining a renomination, he was succeeded by Isaac Lea. Mr. Ord 

 died January 23, 1866. 9 



The anniversary of the founding of the Academy was cele- 

 brated in 1854. On the evening of March 20th, William Parker 

 Foulke delivered an appropriate address in the Hall of the Univer- 

 sity of Pennsylvania, and the following evening more than one 

 hundred members and correspondents, with a few distinguished 

 guests, dined in the hall of the Musical Fund Society, the occasion 

 being long remembered as an unusually pleasant one. 



In 1855, the building was again enlarged by the erection of an 

 additional story of twenty-four feet in height at a cost of $12,263, 

 the entire amount being secured in subscriptions by a committee of 

 which Mr. William S. Vaux was the energetic and efficient chairman. 



The specimens in the apartment fronting on Broad Street, at 

 first designed as a lecture room, were now removed upstairs and the 

 growing library was extended into the room thus vacated which 

 was used subsequently as the place of meeting. The western room 

 in which the meetings had been held was later divided by a galleried 

 partition, thus affording additional space for shelving. 



In 1858, the recently formed Biological Society became the 

 Biological Department of the Academy, Dr. Leidy being the first 

 Director. Valuable contributions were made for the next three 

 years to the separately paged Proceedings by S. Weir Mitchell, 

 Henry Hartshorne, J. Cheston Morris, William A. Hammond, Isaac 

 I. Hayes, J. J. Woodward and the Director. More pressing matters 

 engaged the attention of many of the members on the breaking out 

 of the war, so that the meetings were suspended and not resumed 

 until 1868, when renewed life was acquired by union with the 

 recently organized Microscopical Society of Philadelphia, the com- 

 bination being known as the Biological and Microscopical Section of 

 the Academy. 



As a presiding officer Dr. Lea was dignified and genial, greatly 

 enjoying the exchange of opinions with those brought together each 

 succeeding Tuesday evening. He imparted to the meetings more 

 than ever the character of conversazioni, frequently dropping the 

 gavel long after the appointed time. He died December 8, 1886. 10 



In 1860, the children of the late Augustus E. Jessup, in fulfil- 



9 George Ord, by Samuel N. Rhoads. Cassinia, No. 12, 1908. 



10 The Published Writings of Isaac Lea, LL.D. By Newton Pratt 

 Scudder. Bulletin of the U. 8. National Museum, No. 23. 



