488 



PROCEEDINGS OF THE ACADEMY OF 



[1898. 



December 6. 

 The President, Samuel G. Dixon, M. D., in the Chair. 

 Thirty-three persons present. 



The death of Redwood F. Warner, a member, Nov. 29, aged 81 

 years, was announced. 



Dr. Florence Bascom made a communication on petrographi- 

 cal methods of rock determination, illustrated by the Philadelphia 

 belt of crystalline rocks. (No abstract). 



December 13. 

 The President, Samuel G. Dixon, M. D., in the Chair. 

 Thirty-four persons present. 



December 20. 

 Mr. Charles Morris in the Chair. 



One hundred and thirty persons present. 



A paper entitled "Synopsis of the United States Species of the 

 Hymenopterous Genus Centris Fabricius," by Wm. J. Fox, was 

 presented for publication. 



Prof. Angelo Heilprin made a communication, illustrated 

 by lantern views, on the geology and physical geography of the 

 Klondike Gold Mining Region, with incidents of a journey to 

 Dawson City. (No abstract). 



December 27. 



The President, Samuel G. Dixon, M. D., in the Chair. 



Twenty-nine persons present. 



The following was ordered to be printed: — 



