1899.] NATURAL RfTENrES OF PHILADELPHIA. 217 



April 4. 



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



Twenty persons present. 



A paper entitled '' Thermotnipic Movements of the Leaves of 

 Rhododendron maxinuim L.," by Jolm W. Harshlierger, was pre- 

 sented for iMblication. 



April 11. 



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



Thirty persons present. 



A j)aper entitled " Dynamic Evolution or Form as a Result of 

 Motion," by the Rev. William F. C. Morsell, was presented for 

 publication, the author giving the substance of the comnnmicatiou 

 verbally with lantern illustrations. 



April 18. 



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



Thirty- four persons present. 



The deaths of James McAlpine Sommerville, M.D., and Wil- 

 liam A. Blackwood, M.D., members, were announced. 



Mr. Witmer Stone made a communication on the Josiah 

 Hoopes collection of birds recently added to the ornithological 

 cabinet of the Academy. (No abstract. ) 



April 25. 



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



Thirty-eight persons present. 



A paper entitled ' ' Certain Aboriginal Remains of the Alabama 

 River," by Clarence B. Moore, was presented by title for pub- 

 lication. 

 14 a 



