VI CONTENTS. 



Number 220. 



Page 



Art. XXII.— The Rodadero (Cuzco, Peru),— A Fault Plane 



of Unusual Aspect; by H. E. Gregory 289 



XXIII. — Occurrence and Genesis of a Persistent Parting in 



a Coal Bed of the Lance Formation; by G. S. Rogers. 299 

 XXIV. — About Climatical Variations; by H. Arctowski .. 305 

 XXV. — Late Paleozoic Glaciation in the Boston Basin, 



Massachusetts; by F. H. Lahee 316 



XXVL— Note on the Use of the Wilson Tilted Electroscope; 



by H. W. Farwell 319 



XXVII. — Mammut Americanum in Connecticut ; by C. 

 Schuchert. With a note on the Farmington specimen 



by R. S. Lull 321 



XXVIII. — Hydrolysis of Esters of Substituted Aliphatic 

 Acids; by E. W. Dean 331 



XXIX. — Solid Solution in Minerals. V. The Isomorphism 

 between Calcite and Dolomite; by H. W. Foote and 

 W. M. Bradley 339 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Fused Magnesium Chloride as a Crystallizing Agent, 

 K. A. Hofmann and K. Hoschele, 345. — Carbon Sulphide-Telluride and 

 Carbon Sulphide-Selenide, A. Stock, P. Praetorius, and E. Willfroth: 

 Double Bromides of Gold, A. Gtttbier and J. Huber, 346. — Gravimetric 

 Determination of Selenium, J. Meyer: Active Nitrogen, E. Tiede and E. 

 Domcke: Rays of Positive Electricity and their Application to Chemical 

 Analyses, J. J. Thomson, 347. — Photo-Electricity, H. S. Allen, 348.— 

 Introduction to the Mathematical Theory of Attraction, F. A. Tarleton: 

 Chemistry of the Radio-elements, Part II, F. Soddy: Modern Seismology, 

 349. — Alternating Currents and Alternating Current Machinery: Mutual 

 Repulsion of rigid Parallel Plates separated by a Film of Air, C. Barcs, 350. 



Geology and Mineralogy — Third Annual Report of the Director of the Bureau 

 of Mines, 351. — Canada Department of Mines, 352.— Report of Topo- 

 graphic and Geologic Survey Commission of Pennsylvania, 1910-1912, 

 353. — Graphite Deposits of Pennsylvania, B. L. Miller: Geological Sur- 

 vey of New Jersey: Geologic Atlas of the United States, Niagara Folio, 

 New York, E. M. Kindle and F. B. Taylor: Union of South Africa, 

 Mines Department, Annual Reports for 1912, 354. — Inter-State Conference 

 on Artesian Water: The Ocean: General Account of the Science of the 

 Sea, J. Murray. — Descriptions of Land, R. W. Cautley: Interpretation of 

 Anomalies of Gravity, G. K. Gilbert: Mud Lumps at the Mouths of the 

 Mississippi, 356. — La Face de la Terre, E. Suess: Water and Volcanic 

 Activity: Zeitschrift fur Vulkanologie, 357. — Igneous Rocks and their 

 Origin, R. A. Daly, 358. — Bergalite, 359. — Notices of recently described 

 Minerals, 360. 



Miscellaneous Scientific Intelligence — Carnegie Institution of Washington, 

 361. — Annual Report of the Superintendent of the United States Coast 

 and Geodetic Survey: Newcomb-Englemanns Populare Astronomie, 363. — 

 Milton's Astronomy, The Astronomy of Paradise Lost, T. N. Orchard: 

 Trigonometry, A. M. Kenyon and L. Ingold, 364. — Who's Who in 

 Science, International, 1914: Franklin Institute award of the Elliott Cres- 

 son Medal: The Cambridge Manuals of Science and Literature: Tables and 

 other Data for Engineers and Business Men, C. E. Ferris, 365. 



Obituary — J. Murray: E. S. Holden: W. W. Bailey: G. Mebcalli: A. 

 Gunther: H. B. Woodward: A. R. Clarke, 366. 



