CONTENTS. Vll 



Number 203. 



Page 



Art. XXXVI. — Volcanic Vortex Rings and the direct con- 

 version of Lava into Ash ; by F. A. Perret _ 405 



XXXVII. — Quartz from Alexander County, North Carolina ; 



by J. E. Pogce and V. Goldschmidt 414 



XXXVIII. — Palm from the Upper Cretaceous of New- 

 Jersey ; by N. E. Stevens - 421 



XXXIX. — Preliminary Note on the Shower of Meteoric 

 Stones at Aztec, Navajo County, Arizona ; by W. M. 

 Foote -. ' 437 



XL. — Restoration of Limnoscelis, a Cotylosaur Reptile from 



New Mexico ; by S. W. Williston 457 



XLI. — Iodic Acid Process for the Determination of Bromine 

 in Halogen Salts; by F. A. Gooch and P. L. Blu- 



MENTHAL . -- 469 



XLII. — New Chlorite from Northern Wyoming ; by J. E. 



Wolff _ 475 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics— Dissociation of Hydrogen into Atoms, I. Langmuir : 

 Determination of Sulphur in Pyrites, Allen and Bishop, 477. — Separation 

 of Arsenic from Antimony and other Metals, Moser and Perjotel : 

 Methods in Chemical Analysis, F. A. Gooch : Elementary Applied Chem- 

 istry, L. B. Alltn, 478. —Dictionary of Applied Chemistry, E. Thorpe : 

 Aussere Reibung der Gase und ein neues Prinzip fur Luftpumpen : Die 

 Molekularluftpumpe, 479.— Emission Velocities of Photo-Electrons, A. L. 

 Hughes, 481. — Magnetism and Electricity, E. E. Brooks and A. W. 

 Poyser, 482. — A Text-Book of Physics, A. W. Duff : Gravitation, F. 

 Harris, 483. 



Geology and Mineralogy — Publications of the United States Geological 

 Survey, 484. — Publications of the Bureau of Mines : Onondaga fauna of the 

 Allegheny region, E. M. Kindle, 485. —Preliminary report on the geology of 

 the coastal plain of Georgia, O. Veatch and S. W. Stephenson ; Classifi- 

 cation of the geologic formations of the state of New York, C. A. Hart- 

 nagel, 486. — Central Connecticut in the geologic past, J. Barrell : 

 Eighth Report of the Director of the Science Division, New York State 

 Museum : Beitrage zur Kenntnis der marinen Mollusken im west-euro- 

 paisehen Pliocanbecken, P. Tesch : Canada Department of Mines, 487. — 

 Geological Survey of New Jersey, 488. — Origin of the Himalaya Mountains, 

 S. G. Burrard : Rocks and their Origins, G. A. J. Cole, 489. — Origin 

 of Earthquakes, C. Davison : Identity of Parisite and Synchisite, C. 

 Palache, 490. — Introduction to the Study of Minerals, A. F. Rogers, 491. 



Zoology — Outlines of Evolutionary Biology, A. Dendt, 491.— College Zool- 

 ogy, R. W. Hegner: Le Zebre, A. Griffin: Principles of Economic 

 Zoology, L. S. and M. C. Daugherty, 492. — Elementary Entomology, 

 E. D. Sanderson and C. F. Jackson, 493. 



Miscellaneous Scientific Intelligence— Publications of the Carnegie Institu- 

 tion of Washington, 493. — British Association for the Advancement of 

 Science : Introduction to Agricultural Mycology : Catalogue of 9842 Stars, 

 W. T. Backhouse, 494. — Science Manuals, 495. 



Obituary— L. Boss : W. J. McGee : M. Loeb, 496. 



