The Fournal of Geology 
Vol. XXI CONTENTS FOR FEBRUARY-MARCH 1913 No. 2 
THE RELATIVE SOLUBILITIES OF THE CHEMICAL CONSTITUENTS OF ROCKS - C.H. Suvru, Jr. 105 
‘THE COBALT SERIES; ITS CHARACTER AND ORIGIN - - = - + - = Mortey E. Wuson 121 
THE LATER CENOZOIC HISTORY OF THE WIND RIVER MOUNTAINS, WYOMING 
Lewis G. WESTGATE AND E. B. BRANSON 142 
VARIATIONS OF CERTAIN ADIRONDACK BASIC INTRUSIVES - - - - - Wittt1am J. Mitter 160 
“THE ORDER OF CRYSTALLIZATION IN IGNEOUS ROCKS” a HRSA yan iy ota a Victor ZIEGLER 181 
ANGISTORHINUS, A NEW GENUS OF PHYTOSAURIA FROM THE TRIAS OF WYOMING 
; Maovrice G. Ment 186 
REVIEWS (203 alta Pee Pe Oe ae a Ce a a 
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