TITLES OF PAPERS PRESENTED 73 



MICROSTRUCTURE OF TITAN1FEROUS MAGNETITES 

 BY JOSEPH T. SINGEWALD, JR. 



Read in full from manuscript. 



ORIGIN OF GRANITES AS WELL AS METACRYSTALS BY SELECTIVE 

 SOLUTION — A RECANTATION 



BY ALFRED C. LANE 



Read in full from manuscript. Discussed by G. P. Merrill and E. S. 

 Bastin. 



NEW CLASSIFICATION OF NATURAL WATER 

 BY CHASE PALMER * 



Read in full from manuscript. Discussed by A. C. Lane and W. H. 

 Emmons. 



PRE-CAMBRIAN STRUCTURE OF THE NORTHERN BLACK HILLS AS BEARING 

 ON THE HO ME STAKE ORE BODY 



BY SIDNEY PAIGE 



Read in full from manuscript. Discussed by J. D. Irving. 



H. B. Patton took the chair by invitation of Vice-President White, and 



NOTE ON A VERY DEEP BORING FROM NEAR MCDONALD. PENNSYLVANIA 



BY I. C. WHITE 



was presented in full without notes. Discussion by J. F. Kemp, A. C. 

 Lane, and P. R. Van Horn, with reply by the author. 



GULF COAST PETROLEUM FIELDS OF MEXICO BETWEEN THE T AM ESI A\l> 



TUXPAN RIVERS 



BY I. C WHITE 



Presented in abstract without notes. Discussed by J. P. Kemp and 

 F. W. De Wolff, with reply by the author. 



Vice-President White resumed the chair. 



INADEQUACY OF THE SAPROPELIC HYPOTHESIS OF THE ORIOIK OF COAL 

 BY EDWABD C. JEFFREY ' 



Presented in abstract without notes. Illustrated with lantern slides. 

 Discussion was postponed to the session of Tuesday afternoon. 



1 Introduced by David Whlti 



