IV 



CONTENTS. 



Number 128. . 



Page 



Aet. XL — An Investigation into the Elastic Constants of 



Rocks; by F. D. Adams and E. G. Coker 95 



XII. — Dakotan Series of Northern New Mexico ; by C. R. 



Keyes 124 



XIII. — Plauenal Monzonose (Syenite) of the Plauenscher 



Grand ; by H. S. Washington 129 



XIV. — Colloidal Nuclei and Ions in Dust-free Air saturated 



with Alcohol Vapor; by C. Barus - 136 



XV. — Russian Carboniferous and Permian compared with 



those of India and America ; by C. Schuchert 143 



XVI. — Notes on Some Eruptive Rocks in Mexico ; by F. N. 



Guild 159 



XVII. — Hydrolysis of Salts of Iron, Chromium, Tin, Cobalt, 



Nickel, and Zinc in the Presence of Iodides and Iodates; 



by S. E. Moody 176 



SCIENTIFIC INTELLIGENCE. 



Geology and Natural History — Geodetic Evidence of Isostacy, J. F. Hay- 

 ford, 185. — Pleistocene Deposits of South Carolina, G. T. Pugh, 186. — 

 Geography and Geology of Alaska, A. H. Brooks, C. Abbe, Jr. and R. U. 

 Goode : Geology and Mineral Resources of part of the Cumberland Gap 

 Coal Field, Kentucky, G. H. Ashley and L. C. Glenn : Pleistocene 

 Deposits of Sankoty head, Nantucket, and their Fossils, J. A. Cushman, 

 187. — Tertiary and Quaternary Pectens of California, R. Arnold : Cam- 

 brian Faunas of China, C. D. Walcott : Plant Response as a Means of 

 Physiological Investigation, J. C. Bose, 188. — Heather in Townsend, 

 Mass. : Biology of the Frog, S. J. Holmes : A Course in Vertebrate Zoology, 

 H. S. Pratt, 190. — Life of Animals, E. Ingersoll, 191. 



Miscellaneous Scientific Intelligence — Recent Text-books on Astronomy, 191. 

 — Publications of the Royal Society of London, 192. — Physical Optics, R 

 W. Wood, 193. 



Obituary — H. A. Ward : C. R. von der Osten Sacken : L. Brackebusch, 

 194. 



