C O N T K N TS. 



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Art. XXXY.I —Several Lecture Experiments in Elementary 



Physics; by D. A. Kbuioea.. 329 



XXXVII. — Faunal Succession in the Port Clarence Lime- 

 stone, Alaska ; by E. JM. Kindt, 10 335 



XXXVIII. — Some Factors Influencing the Percentages of 

 Mineral Plant Foods Contained in Soils ; by 0. D. von 



ENGELN 350 



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



XL. — Electrolysis of Sodium Chloride with the Mercury i 

 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 [ron and Vanadium, 

 Muller and Dieffenth ale s : Passive State of Metals, JO. Grave, 393. — 

 Combinations of Metallic Chlorides, (!. 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 HalJey's. Comet, G. 

 ( 'laude : Modern Science Reader, with Special Reference to Chemistry, 

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

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



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

 Dei- electrische Lichtbogen, H. Th. Simon, 396. 



nd Mineralogy — Notes on the Gi if 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 An 

 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. 

 vax der Veen : Rock Minerals, J. P. Iddincs, 3i) ( J. 



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. Olskn, 401. — Physikalische Cbemie der Zelle unci der Gewebe, R. 

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

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



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



