PROCEEDIN 



OF THE 



American Philosophical Society 



HELD AT PHILADELPHIA 



FOR PROMOTING USEFUL KNOWLEDGE 



Vol. LII. 



September— October, 1913. 



No. 211. 



CONTENTS 



Geology of the Region about Natal, Rio Grande do Norte, Brazil. 

 By Olaf Pitt Jenkins - - - - - . - - 431 



Guatemala and the Highest Native American Civilization. By 

 Ellsworth Huntington -------- 467 



The Correlation of Structure and Function in the Development of the 



Nervous System. By Stewart Baton, M.D. - - - - 488 



Further Considerations on the Origin of the Himalaya Mountains and 



the Plateau of Tibet. By T. J. J. See - - - - - 495 



Factors in the Exchange Value of Meteorites. By Warren M. Foote 516 



The True Atomic Weight of Bromine. By Dr. Gustavus Hinrichs 543 



Minutes : 



Stated Meeting, January j - - - - - - _ - - iii 



Stated Meeting, February 7 - - - y^^^^^^ '"^^^^^^ *^' 



Stated Meeting, March 7 • - - / ' ~ " -\iz' 



Stated Meeting, April 4 ' ' ' Vif 0€T 2 6 1926 -^j ^ 



General Meeting, April ly, 18 and ig - \- u - - - .-A^ vi 

 Stated Meeting, May 2 - - - ^**''4 2?0NAI: MVjj g*^ xv 



Stated Meeting, October j-------- jcvi 



PHILADELPHIA 

 THE AMERICAN PHILOSOPHICAL SOCIETY 



104 South Fifth Street 



