VI CONTENTS. 



Number 232. 



Page 

 Art. XXII. — Pleistocene Ground Sloth, Mylodon harlani, 



from Rock Creek, Texas ; by R. S. Lull 32V 



XXIII. — Simple and Inexpensive Apparatus for Tidal 



Analysis ; by E. W. Brown, F.R.S. 386 



XXIV. — Radio-active Content of Certain Minnesota Soils; 



b\^ J. C. Sanderson 391 



XXV. — Use of Hydrochloric Acid in the Estimation of Cer- 

 tain Forms of Organic Nitrogen ; by W. A. Drushel 

 and M. M. Brandegee _. 398 



XXVI. — Supposed Vanadic Acid from Lake Superior is Cop- 

 per Oxide ; by W. T. Schaller ..... 404 



XXVII. — The System Anorthite-Forsterite-Silica; by O. 



Andersen ._ 407 



XXVIII. — Studies on the Etched Figures of Japanese 



Quartz ; by S. Ichikawa. (Plates II to VII) 455 



XXIX. — Datolite from North Plainfield, Somerset County, 



New Jersey; by A. C. Hawkins ._ . 4*73 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Production of Chloropicrin from Organic Com- 

 pounds, E. L. Datta and N. R. Chatterjee: Determination of Gasolene 

 Vapor in Air, G. A. Burrell and A. W. Robertson, 475. — Transmutation 

 of the Chemical Elements, W. P. Jorissen and J. A. Vollgraff: Chemis- 

 try of Cyanogen Compounds, H. E. Williams: Chemie der hydraulischen 

 Binclmittel, H. Kuhl and W. Knothe, 476. — Diffusion of Gases through 

 Mercury Vapor, W. Gaede, 477. — Elektrische Spektralanalyse chemischer 

 Atome, J. Stark: Advanced Electricity and Magnetism, W. S. Franklin 

 and B. MacNutt, 480. 



Geology and Mineralogy — Canada, Department of Mines, Geological Survey 

 Branch, R. W. Brock, 481.— State Geological Survey of Illinois: Further 

 Notes on Meteor Crater, Arizona, D. M. Barringer, 482. —New Meteorites, 

 O. C. Farringto^: Neues Jahrbuch fur Mineralogie, etc.; Festschrift Max 

 Bauer zum seibzigsten Gebnrtstage gewidmet: Amethysts in Egypt, 483. 



Miscellaneous Scientific Intelligence. — Carnegie Institution of Washington, 

 Year Book No. 13, 1914 : Report of the Librarian of Congress, H. 

 W. Putnam, etc. — Text-book of Embryology, W. Heape, 485. — Neue 

 Grundlagen der Logik, Arithmetik und Mengenlehre, J. Konig: United 

 States Coast and Geodetic Survey: The Smithsonian Institution, W. H. 

 Dall, 486. 



Obituary— J. Geikie : G. F. J. A. Auwers : C. E. Bessey : L. L. Dtche, 

 486. 



