36 The Academy of Natural Sciences 



death of Mr. Tryon seven volumes of the first series and fifteen of 

 the second have been issued, every species of which a figure can be 

 obtained being illustrated by colored lithographic plates. 



Since the formation of the Entomological Section by the 

 union of the American Entomological Society with the Academy 

 in 1875, the publication of the Transactions of the Society has 

 been continued. The Entomological News, embracing the proceed- 

 ings of the Entomological Section was begun in 1890, and the 

 nineteenth volume has been completed. 



The several series of the publications form 151 volumes. The 

 output for the year 1908 amounted to 1,936 pages and 133 plates. 

 It is gratifying to know that the quantity of the matter published 

 is in no sense at the expense of its quality. The importance of the 

 Academy is measurably dependent on the discoveries announced in 

 its publications. They are the organs of speech of the society by 

 means of which it holds communication with naturalists in all 

 civilized countries. They encourage the student to labor, for 

 investigation would be purposeless if the results could not be given 

 to the world. 



LECTURES AND INSTRUCTION 



On the acquisition of the Seybert collection of minerals in 

 August, 1814, Dr. Gerard Troost, the President, delivered a course 

 of lectures on mineralogy. Courses on entomology were delivered 

 by Mr. Say and on botany by Drs. Waterhouse and Barnes. The 

 latter were so successful that they were repeated the following year. 

 Soon after the Academy's occupancy of the hall in Gilliams' Court, 

 Mr. Shinn gave discourses on chemistry, and this form of activity 

 was kept up until the removal to the building at Twelfth and 

 George's Streets, twenty-five lectures having been delivered in 1824 

 by Messrs. Coates, Darrach, Gilpin, Godman, Griffith, Harlan, 

 Hays, Keating, Lea, Mitchell, Patterson, Say and Troost. No 

 lectures seem to have been delivered in the building at Twelfth 

 and George's Streets, probably because of lack of accommodation, 

 but" a fine lecture room was provided in the new hall on Broad 

 Street, and provision was made in 1840 for renting the room to 

 lecturers on science, literature and the liberal arts, on such terms 

 as might be thought proper by the Lecture Committee. The use 

 of the room for such purposes was not found to be of practical 

 importance, and it was subsequently appropriated for the arrange- 

 ment of a portion of the collection until the completion of another 



