1881.] NATURAL SCIENCES OF PHILADELPHIA. 481 



the assistance which hoped-for endowments are designed to give. 

 As the library and museum are accessible to all for the purpose 

 of study, the}" are in condition to pursue their scientific labors 

 without acquiring the title of professor from the Academj^" 



If the enactment be founded as stated, the objection to the 

 appointment of professors before making provision of facilities 

 suitable to the work imposed upon them, and of sufficient means 

 for their permanent support, has no less force now than when first 

 made five years ago. 



It has been considered expedient to inaugurate the scheme of 

 professorships before providing the wa3'S and means for their 

 permanent support, in the hope that the effort may meet with sub- 

 stantantial encouragement. 



Dr. J. Gribbons Hunt was duly elected Professor of Histol- 

 ogy and Microscopic Technology, April 17, 187Y, without compen- 

 sation or authority to incur expense. 



At a stated meeting of the Council, December 2Y, 1880, Mr. 

 Angelo Heilprin was duly elected Professor of Invertebrate 

 Paleontology ; and January 24, 1881, Mr. Henry Carvill Lewis 

 was appointed Professor of Mineralogy. 



Knowing that the society has no means to defray any expense 

 incidental to the professorships, and that the long wished-for 

 endowments to support them have not yet been made, these gentle- 

 men have generouslj'^ volunteered to contribute their time and 

 valuable services towards promoting the interests of the Academy 

 and scientific advancement without pecuniary compensation. 



The Committee on Instruction and Lectures made arrange- 

 ments necessary to enable the professors to inaugurate the work of 

 instruction. Professor Heilprin delivered a lecture introductory 

 to his course on Invertebrate Palaeontology before the Academy, 

 March 6 ; and at the stated meeting of the 15th, Professor Lewis 

 delivered an introductory lecture to his course on Mineralogy. 



The average attendance at Professor Heilprin's course of twenty- 

 six lectures was twenty-five, and at Professor Lewis' course of 

 fourteen lectures, thirty-five. 



The Rev. Dr. Henry C. McCook, Chairman of the Committee 

 on Instruction and Lectures, said, in his report. May 31, 1881: 

 " The committee feels pleasure in recognizing the valuable services 

 rendered by the professors to the classes of last winter — service 

 that has been none the less valuable and is all the more entitled 



