CONTENTS Vll 



Numlber 11. 



Page 



Art. XVII. — The Crystal Structure of Alabandite (MnS) ; 



by R. W. G. Wtckoff 239 



Art, XVIII. — Later Cenozoic .Mammalian Remains from 

 the Meadow Valley Region, Southeastern N'evada ; 

 by C. Stock, 250 



Art. XIX. — The Classification of Igneous Rocks — A Study 



for Students ; by L. V. Pirsson, 265 



Art. XX. — Studies in the Cyperacese; by Theo. Holm. 

 Carices aeorastachyae : Crinitae nob., Apert?e nob., 

 and Magnificge nob. (With 8 figures drawn from 

 nature by the author) 285 



Art. XXI. — The Stratigraphy of Eastern IsTew Mexico — a 



Correction ; by J. L. Rich, 295 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics. — A New Eeaction for Ammonia, and its Application 

 for the detection of Nitrogen in Organic Substances, C. D. Zenghelis, 298. 

 — The Quantitative Separation of Arsenic, Antimony and Tin, F. L. Hahn 

 and P. Philippi, 299. — Chemical Reactions and their Equations, I. W. D. 

 Hackh : Food Products, Their Source, Chemistry and Use, E. H. S. 

 Bailey: Discussion of Isotopes, 300. — Wireless Telegraphy and Telephony, 

 L. B. Turner, 302. 



G^eo/ogj/. —The White River Badlands, C. C. O'Harra, 303. — Some Anticlines of 

 Routt County, Colorado, R. D. Crawford, K. M. Willson, and V. C. 

 Perini : Permian Salt Deposits of the South-central United States, N. H. 

 Darton: Interrelations of the Fossil Fuels, J. J. Stevenson: Foraminifera 

 of the Philippine and adjacent Seas, J. A. Cushman, 304. — The Direction 

 of Human Evolution, E. G. Oonklin, 305. — Wissenschaftliche Forschungs- 

 berichte; Natur wissenschaftliche Reihe, Bd. II, AUgemeine Geologie und 

 Stratigraphie, A. Born: Mineralogische Tabellen, P. Groth and K. Mie- 

 LEiTNER: Lehrbuch der Mineralogie (G. Tschermak), F. Becke, 306. 



Miscellaneous Scientific Intelligence. — Elements of Map Projection with Appli- 

 cations to Map and Chart Construction, C. H. Deetz, 306. — Secrets of 

 Earth and Sea, R. Lankester, 307. — Observations on the Living Gastro- 

 pods of New England, E. S, Morse : Elements of Bond Investment, A, M. 

 Sakolski, 308. 



