CONTENTS 
* Pag« 
MATHEMATICS. — A NECESSARY AND SUFFICIENT CONDITION FOR THE EXISTENCE OF A 
Stieltjes Integral By Gilbert Ames Bliss 633 
Mathematics. — ^Transformations of Applicable Conjugate Nets of Curves Jon 
Surfaces , By Luther Pfahler Eisenhart 637 
Mathematics. — On Bilinear and N-Linear Functionals . By Charles Albert Fischer 640 
Chemistry. — The Crystal Structure of Chalcopyrite Determined by X Rays 
By Charles L. Burdick and James E. Ellis 644 
Geology. — ^The Isostatic Subsidence of Volcaotc Islands . . By W. M. [Davis 649 
Mathematics. — On the Deformation of an N-Cell , , , , By Oswald Veblen 654 
Mathematics. — ^A Theorem on Series of Orthogonal Functions with an Applica- 
tion to Sturm-Liouville Series By George D. Birkhof 656 
Mineralogy. — Low-Temperature Formation of Alkaline Feldspars in Limestones 
By Reginald A. Daly 659 
Physics. — ^The Interferometry of Small Angles, etc. Methods by Direct and 
Reversed Superposed Spectra By Carl Barus 365 
