238 



[May 2, 



(102); Smithsonian Institution (102) ; Essex Institute (102); 

 Davenport Academy (102); Providence Franklin Society 

 (102) ; and the Liverpool Lit. and Philo. Society (Nov. 25, 

 1878, 100 and 101), and postal cards from many members. 



Letters of envoy were received from the Lit. and Philo. 

 Society of Liverpool, and from the Societe des Sciences de 

 P Agriculture de Lille, dated April 1, 1879. 



A letter offering an exchange of publications was received 

 from the Director of Studies of the Ecole Polyteehnique, 

 dated Paris, April 6, 1879. 



Donations for the "Library were reported from the Asiatic 

 Society of Japan ; the Royal Academy dei L. at Rome ; Dr. 

 Prof. F. J. Lauth, of Munich ; the Vaudoise Society ; Zoolo- 

 gischer Anzeiger ; Royal Belgian Academy ; Revue Politique ; 

 Com. Geog. Society at Bordeaux ; R. Astronomical Society ; 

 London Nature ; Lit. and Phil. Society of Liverpool ; Mr. 

 James W. Barclay ; Silliman's Journal ; Penna. Historical 

 Society ; Am. Journal of Pharmacy ; Prof. Andrews, of the 

 Geol. Survey of Ohio ; and Prof. Joseph LeConte. 



A communication was read by the Secretary, entitled, 

 " Meteoric Fireballs seen in the United States during the 

 year ending March 31, 1879, by Prof. Daniel Kirkwood." 



Prof. Cope exhibited a life-size drawing of a vertebra of a 

 new species of Camelosaurus, for which he proposed the name 

 C. leptodirus, and showed in what it differed from the verte- 

 bras of C. swpremus. 



Prof. Marks exhibited a beautiful " Compound Compass," 

 made under his direction by ¥m. Young & Sons, for the use 

 of the Geological Survey in drawing tangents and curves of 

 very great radius, or parallels and meridians, and explained 

 how this invention of Peaucellier could be modified for 

 other uses. 



Mr. Lesley exhibited a large distemper map of Pennsyl- 

 vania, painted recently to exhibit to the Legislature the 

 progress of the Survey. Also the first bound copy of Les- 

 quereaux's Coal Flora Atlas of 87 plates, just published by 

 tho Board of Commissioners of the Geological Survey. 



