/ -^ ■ HP" 



PROCEEDINGS 



OF THE 



American Philosophical Society 



HELD AT PHILADELPHIA 



FOR PROMOTING USEFUL KNOWLEDGE 



Vol. LII. April, 191 3. No. 209. 



CONTENTS 



The Fluting and Pitting of Granites in the Tropics. By J. C. 



Branner - - -- - - 163 



On the Prospect of Obtaining Radial Velocities by Means of the Ob- 

 jective Prism. By Frank Schlesinger, M.A., Ph.D. - - 175 



The Historical Value of the Patriarchal Narratives. By George A. 



Barton ._-.-. 184 



The Determination of Uranium and Vanadium in the Carnotite Ores 



of Colorado and Utah. By Andrew A. Blair - - - - 201 



Suetonius and His Biographies. By John C. Rolfe - - - - 206 



The Control of Typhoid Fever by Vaccination. By Mazyck P. Ra- 



venel, M.D. 226 



The Treaty Obligations of the United States Relating to the Panama 



Canal. By Charlemagne Tower 234 



A Counsel of Perfection : A Plan for an Automatic Collection and Dis- 

 tribution of a State Tax for Higher Education. By J. G. 



Rosengarten 243 



» Climatic Areas of the United States as Related to Plant Growth. By 



Burton Edward Livingston ------- 257 



Some Diffraction Phenomena; Superposed Fringes. By Charles F. 



Brush . - <- 276 



Matter in its Electrically Explosive State. By Francis E. Nipher - 283 



PHILADELPHIA 



THE AMERICAN PHILOSOPHK 



104 South Fifth Street "^^^/Oival MUS*i 



1913 



