PROCEEDINGS 



OF THE 



American Phil(;)$9|]f|;ifc Society 



HELD AT PHILADELPHIA 



FOR PROMOTING USEFUL KNOWLEDGE 



Vol. LI. July, 191 2. No. 205. 



CONTENTS. 



Heredity of Feeble -raindedness. By Henry H. Goddard 173 



The Heredity of Epilepsy Analyzed by the Mendelian Method. By David 



Fairchild Weeks 178 



Is the Control of Embryonic Development a Practical Problem ? By Charles 



R. Stockard 191 



An Avian Tumor in its Relation to the Tumor Problem. By Peyton 



Rous, M.D : 201 



The Protein Poison. By Victor C. Vaughan, M.D 206 



Some Geochemical Statistics. By Frank Wigglesworth Clarke 214 



Thermal Relations of Solutions. By William Francis Magie 235 



New Magnetic Charts of the Indian Ocean. By L. A. Bauer 240 



The Dairy of a Voyage to the United States, by Moreau de Saint-Mery. By 



Stewart L. Mims 242 



The Classification of Carbon Compounds. By Marston Taylor Bogert. , . 252 



Stated Meeting, April 12, igi2 ix 



General Meeting, April 18, ig and 20, igi2 x 



Stated Meeting, May j, igi2 xvi 



PHILADELPHIA 



THE AMERICAN PHILOSOPHICAL SOCIETY 

 104 South Fifth Street 



1912 



