1902.] natural sciences of philadelphia. 113 



March 4. 

 Mr. Arthur Erwin Brown, Vice-President, in the Chair. 



Thirty persons present. 



A paper entitled ' ' Karyokinesis and Cytokinesis in the Matura- 

 tion, Fertilization and Cleavage of Crepidula and other Gastro- 

 pods," by Edwin G. Conklin, Ph.D., was ordered to be printed in 

 the Journal. 



The death of Francis W. Lewis, M. D. , a member, was announced. 



The JS^eurofibrUlary Theory and its Bearincjs upon Localization 

 of Function in the Nervous System. — Dr. Charles K. Mill8, 

 after referring to the correlation of nerve enei'gy with the other 

 forms of physical energy, spoke of the reception and differentia- 

 tion of stimuli by peripheral end organs, and the manner in 

 which the neurofibrils or their elementary constituents transmit 

 nervous impulses, holding that the elementary fibrils in which is 

 stored neural energy not only conduct or transmit nervous im- 

 pulses, but by means of the special manner in which they are 

 arranged in the nerve centres as well as in the periphery, deter- 

 mine the intensity and character of the dischai'ge. He regarded 

 the fibrillary coils and bundles as representing a complicated in- 

 duction apparatus. Localization of function is brought about by 

 means of special arrangements of intracellular and intercellular 

 neurofibrillary coils and plexuses in the particular regions called 

 centres. 



March 11. 

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



Eleven persons present. 



Papers under the following titles were presented for publication : 

 " The Germination of the vSeeds of Carapa guianensis Aubl.," 



by John W. Harshberger, Ph.D. 



" Revision of the Japanese Yiviparidte, with Notes on INIehinia 



and Bithynia," by Henry W. Pilsbry. 

 8 



