CONTENTS. 



Scientific Proceedings (50th-54th meetings): 



PAGE 



Communications of the fiftieth meeting, October 16, 1912. . . 1 



Communications of the fifty-first meeting, December 18, 1912 . . 23 



Communications of the fifty-second meeting, February 19, 1913 . 65 



Communications of the fifty-third meeting, April 16, 1913. . . 123 



Communications of the fifty-fourth meeting, May 21, 1913 . . 155 

 Recapitulation of the names of the authors and of the titles of the 



communications 193 



Executive Proceedings (soth-54th meetings) 203 



Register of Names and Addresses of the Members . . . 207 



List of Officers 215 



Classified List of Members 217 



Index of the Scientific Proceedings 221 



i i 



