viii CONTENTS OF VOLUME XIV 



PAGE 



The Texture of Igneous Rocks. Whitman Cross, J. P. Iddings, L. V. 



Pirsson, H. S. Washington -------- 692 



Natural Mounds. Marius R. Campbell ------ 708 



Rock Folds Due to Weathering. Marius R. Campbell - - - 718 



Geology of the Lower Amazon Region. Charles Schuchert - - 722 



The Relation of Radioactivity to Vulcanism. George Davis Louder- 

 back -----.--..-- y^y 



Review: An Introduction to Chemical Crystallography, P. Groth (J. P. I.) 758 



