THE

AMERICAN

JOURNAL OF SCIENCE.

EDITOR: EDWARD S. DANA.

ASSOCIATE EDITORS

PROFESSORS WILLIAM M. DAVIS AND REGINALD A. DALY,
OF CAMBRIDGE,

PROFESSORS HORACE L. WELLS, CHARLES SCHUCHERT,
HERBERT E. GREGORY, WESLEY R. COE AND
FREDERICK E. BEACH, OF NEW HAVEN,

PROFESSOR EDWARD W. BERRY, OF BALTIMORE,
DRS. FREDERICK L. RANSOME AND WILLIAM BOWIE,
OF WASHINGTON.

FIFTH SERIES

VOL. I-[WHOLE NUMBER, CCI].

WITH FOUR PLATES

NEW HAVEN, CONNECTICUT.

1921.

289670

THE TUTTLE, MOREHOUSE & TAYLOR COMPANY NEW HAVEN

Number 1.

ART. I. Relations of Subjacent Igneous Invasion to Regional
Metamorphism; by J. BARRELL

ART. II.-Note on Augite from Vesuvius and Etna; by H.

S. WASHINGTON and H. E. MERWIN

ART. III. Chionophila Benth., a Morphological Study; by

THEO. HOLM. (With 15 figures drawn from nature by

the author).

ART. IV.―Geology of the Muddy Mountains, Nevada, with

a Section to the Grand Wash Cliffs in Western Arizona;

by C. R. LONGWELL

Page

1

20

31

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 Physics-A Revision of the Atomic Weight of Aluminium,

T. W. RICHARDS 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. R. MERTON, 89.-Magnetic Susceptibilities of Low Order, 90.-The

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

Study, E. R. DoWNING, 91.-Annuaire pour l'An 1920, 92.

Geology-Der Südrand der Puna de Atacama (NW-Argentinien); Ein Beitrag

zur Kenntniss des Audinen Gebirgstypus und zu der Frage der Gebirgs-

bildung, W. PENCK, 92.- Der Selpausselka, L. LEIVISKÄ: De marine

Kridtaflejringer, J. P. J. RAVN. 93.-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. R.

CROOK, 95.

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

ian Institution. C. D. 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.