CONTENTS TO VOLUME I.. 



Number 1. • 



Page 



Art. I. — Relations of Subjacent Igneous Invasion to Regional 



Metamorphism; by J. Barrell 1 



Art. II. — Note on Angite from Vesuvius and Etna; by H. 



S. Washington and H. E. Merwin 20 



Art. III. — Chionophila Bentli., a Morpliological Study; by 

 Theo. Holm. (With 15 figures drawn from nature by 

 tbe author) 31 



Art. IV. — Geology of the Muddy Mountains, Nevada, with 

 a Section to the Grand Wash Cliffs in Western Arizona; 

 by C. R. LoNGAVELL ■. 39 



Art. v.— The Stanley Shale of Oklahoma; by C. W. Honess 63 



Art. VI. — Popocatepetl again in Activity; by P. Waitz. . . 81 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Fhysics — A Revision of the Atomic Weight of Aluminium, 

 T. W. EicHARDS and H. Krepelka : The Chemists' Year Book, 1920, 

 F. W. Atack, 88. — Dictionary of Explosives, A. Marshall,: Catalysis 

 and its Industrial Applications, E. Jobling : American Lubricants, L. B. 

 LocKHART ; Fuel Oil in Industry, S. O. Andros : Spectra of Isotopes, 

 T. E. Merton. 89. — Magnetic Susceptibilities of Low Order, 90. — The 

 Airplane, F. Bedell : A Field and Laboratory Guide in Physical Nature 

 Study, E. E. Downing, 91.— Annuaire pour I'An 1920, 92. 



Geology — Der Siidrand der Puna de Atacama (NW-Argentinien) ; Ein Beitrag . 

 zur Kenntniss des Andinen Gebirgstypus uud zu der Frage der Gebirgs- 

 bildung, W. Penck, 92.— Der Selpausselka, L. Leiviska : De marine 

 E.ridtafiejringer, J. P. J. Ravn. 98. — Illinois State Geological Survey, F. 

 W. DeWolf : Bulletins of the Buffalo Society of Natural Sciences, 94. — 

 Guide to the Mineral Collections in the Illinois State Museum, A. E. 

 Crook, 95. 



Miscellaneous Scientific Intelligence — Report of the Secretary of the Smithson- 

 ian Institution, C. 1). Walcott, for the year ending June 30, 1920, 95. — 

 Publications of the Allegheny Observatory of the University of Pittsburgh, 

 F. Schlesinger, 96. 



Obituary— M. Margules : K. H. Struve : Y. Delage, 96. 



