CONTENTS. Vll 



Nnm'ber 191. 



Page 



Art. XXXVI. — Several Lecture Experiments in Elementary- 

 Physics ; by D. A. Krkider 329 



XXXVII. — Faunal Succession in the Port Clarence Lime- 

 stone, Alaska ; by E. M. Kindle 335 



XXXVIII. — Some Factors Influencing the Percentages of 

 Mineral Plant Foods Contained in Soils ; by O. D. von 

 Engeln -- - 350 



XXXIX. — Alunite-Beudantite Group ; by W. T. Schaller 359 



XL. — Electrolysis of Sodium Chloride with the Mercury 



Cathode ; by C. A. Peters 365 



XLI. — Reactions in a System of Nickel or Platinum, Mer- 

 cury, and Sodium Chloride ; by C. A. Peters 386 



XLII. — Remarks on the Paper by L. A. Bauer : " On 



Gravity Determinations at Sea " ; by O. Heckbr 388 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Volumetric Determination of Iron and Vanadium, 

 Muller and Dieffenthalek : Passive State of Metals, E. Grave, 393. — 

 Combinations of Metallic Chlorides, G. Herrmann : New Method for the 

 Separation of Cerium from other Earths, C. James and L. A. Pratt : 

 Composition of the Atmosphere after the Passage of Halley's Comet, G. 

 Claude : Modern Science Reader, with Special Reference to Chemistry, 

 R. M. Bird, 394. — Volumetric Analysis, F. Sutton : Principles of Physics, 

 W. F. Magie : Direct and Alternating Current Manual, F. Bedell and 



C. A. Pierce, 395.— Applied Electrochemistry, M. de Kay Thompson : 

 Der electrische Lichtbogen, H. Th. Simon, 396. 



Geology and Mineralogy — Notes on the Geology of the Gulf of St. Lawrence, 

 J. M. Clarke : Observations on the Magdalen Islands, J. M. Clarke ; and 

 The Carbonic Fauna of the Magdalen Islands, J. W. Beede : New Ameri- 

 can Fossil Crinoids, F. Springer: Middle Cambrian Annelids, C. D. 

 Walcott, 397. — Extent of the Anderdon beds of Essex County, Ontario, 

 T. Nattress: Connecticut Geological and Natural History Survey, Volume 

 III, Bulletins 13-15 : Production of Gems and Precious Stones in 1910, 



D. B. Sterrett, 398. — Crystalline Symmetry of the Diamond, A. L. W. E. 

 van der Veen : Bock Minerals, J. P. Iddings, 399. 



Miscellaneous Scientific Intelligence— Langley Memoir of Mechanical Flight, 

 C. M. Manly, 400. —A Treatise on Hydraulics, H. J. Hughes and A. T 

 Safford : Pure Foods ; their Adulteration, Nutritive Value and Cost, 

 J. C. Olsen, 401. — Physikalische Chemie der Zelle und der Gewebe, R. 

 Hober : Guide to the Exhibition in the British Museum of Natural History 

 of Animals, Plants, and Minerals mentioned in the Bible, 402. 



Obituary — F. J. Jervis-Smith : M. Pierre Emile Levassent, 402. 



