191^] MINUTES. 



XI 



Thursday Evening, April i8, 8 o'clock. 



Celebration of the Centenary of the Introduction of Gas as an 



Illuminant. 



Under the auspices of The American Philosophical Society, 



The Franklin Institute, The American Chemical 



Society, The American Gas Institute. 



William W. Keen, M.D., LL.D., in the Chair. 



" By-Products in Gas Manufacture," by Charles E. Munroe, 

 Professor of Chemistry, George Washington University, 

 Washington. 

 For the titles of the addresses on Friday, April 19, see the 

 special programme. 



Friday Adorning, April ig. 

 William W. Keen, M.D., LL.D., President, in the Chair. 



Morning Session — lo.oj o'clock. 



The following papers were read : 



" Heredity of Feeble-mindedness," by Henry H. Goddard, 

 Director of Research, The Training School, Vineland, N. J. 

 (Introduced by Dr. Henry H. Donaldson.) 



" The Inheritable Factors of Epilepsy," by David F. Weeks, 

 M.D., Superintendent of the New Jersey State Village for 

 Epileptics at Skillman. (Introduced by Dr. Henry H. Don- 

 aldson.) 



" Is the Control of Embryonic Development a Practical Prob- 

 lem?" by Charles R. Stockard, Ph.D., Professor of Anatomy, 

 Cornell University Medical College. (Introduced by Dr. 

 Henry H. Donaldson.) Discussed by Doctors Donaldson, 

 A. C. Abbott, Goddard, Weeks, Stockard, and Bogert. 



''An Avian Tumor in Its Relation to the Tumor Problem," by 

 Peyton Rous, M.D., of the Rockefeller Institute, New York. 



