1881.] ^5o 



Stated Meeting^ April 15, 1881. 



Present, 17 members. 



President, Mr. Fraley, in the Chair. 



A photograph of Herr Goppert was received for the al- 

 bum, in a letter of envoy, dated Breslau, March 24, 1881. 



Letters of acknowledgment were received from Herr 

 Bernard Studer, dated Berne, March 25 (106 and List), 

 and from the Zool. Soc. Amsterdam (105, 106 and List). 



The Physical Section of the Ch. Phy. Soc. Imp. University 

 of St. Petersburg was on motion placed on the list of cor- 

 respondents to receive the Proceedings. 



Donations for the Library w^ere announced from the 

 Russian Academy ; Accad. del Lincei at Rome ; Society at 

 Emden; Dr. Otto Wolfenstein of Valencia; Com. Geological 

 Society, Bordeaux ; Halifax Library Company ; Prof. 0. C. 

 Marsh ; Mr. Henry Phillips, Jr. ; ISew Jersey Historical 

 Society ; Hamilton College, N. Y. ; Wyoming Historical & 

 Geological Society ; American Journal of Pharmacy, and Am. 

 Jour. Med. Sciences; U. S. Coast Survey ; University of Vir- 

 ginia, and Major Jed. Hotchkiss. 



A drawing and description of his improved " Centigrad 

 Photometer " was received from D. Coglievina of Vienna. 



Prof. P. E. Chase, explained certain relations of the 

 spectrum line F with other lines and data suggesting the 

 probable identity of hydrogen and the luminiferous sether. 



Prof. Cope read a paper on the Perissodactyla. 



Dr. Konig made remarks on Dr. P. F. Keinsch's recent 

 plates of the misroscopic lithology of anthracite and other 

 coals. 



Mr. Lesley communicated an appendix to Dr. Spencer's 

 paper on the Lake Erie former water-basin, suggesting the 

 probable flow of the upper Ohio from Pittsburgh to Butler, 

 thence, via New Castle, up the present Mahoning Valley and 

 down the Grand Valley of Ohio to Lake Erie. 



