CONTENTS. 



Number 60. 



Page 

 Art. XXXIX. — Torsional Magnetostriction in Strong 



Transverse Fields and Allied Phenomena; by C. Barus 407 

 XL. — Notes on Tellurides from Colorado ; by C. Palache. 419 

 XLT. — New Species of Merycochoerus in Montana; by E. 



Douglass. (Parti.) 428 



XLII. — Mohawkite, Stibio-domeykite, Bomeykite, Algodo- 



nite and some artificial copper-arsenides; by G. A. 



Koentg 439 



XLIII. — Heat of Solution of Resorcinol in Ethyl Alcohol; 



by C. L. Speyers and C. R. Roseel 449 



XLIV. — Sulphocyanides of Copper and Silver in Gravimetric 



Analysis; by R. G. Van Name 451 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Action of Permanganate upon Hydrogen Peroxide, 

 Baeyer and Villiger : Instance of Trivalent Carbon: Triphenylmethyl, 

 Gomberg, 458. — Phosphorescence of Inorganic Chemical Preparations, E. 

 Goldstein: Weight of Hydrogen Desiccated by Liquid Air, Lord Ratleigh, 

 459 —Separation of Tungsten Trioxide from Molybdenum Trioxide, M. J. 

 Ruegenberg and E. F. Smith: Radio-active Barium and Polonium: Lecture 

 Experiments Illustrating the Electrolytic Dissociation Theory and the Laws of 

 the Velocity and Equilibrium of Chemical Change, A. A. Notes and A. A. 

 Blanchard, 460. — Physikalisch-chemische Propadeutik, H. Griesbach : School 

 Chemistry, J. Waddell : Lecdns de Chimie Physique, J. H. van't Hoff : 

 Viscosity of Gases as affected by Temperature, Lord Ratleigh, 461. — Absorp- 

 tion of gases by glass powder, P. Mulfarth, 462. — Normal lines of iron, 

 Katser: Arc spectra of some metals in an atmosphere of hydrogen, H. Crew : 

 Recognition of the Solar Corona, independent of the total eclipse, H. Des- 

 landres : Loss of charge by evaporation, W. C. Henderson : Action of the 

 coherer, T. Mizuno, 463. — Loss of electrical charges in air which is traversed 

 by ultra-violet rays, P. Lenard: Handbuch der Spectroscopie, H. Katser, 464. 

 — Brief Course in General Physics, G. A. Hoadlet, 465. 



Geology and Mineralogy — U. S. Geological Survey. 20th Annual Report 1898-99. 

 Part III, Precious Metal Mining Districts, J. S. Diller, F. H. Knowlton, 

 W. Lindgren, W. H. "Weed, and L. V. Pirsson, 465. — Iowa Geological Survey, 

 Vol. X. Annual Report, 1899, with accompanying papers, S. Calvin and H. 

 F. Bain, 467. — Cleopatra's Emerald Mines, D. A. Mac Alister, 468. — Hand- 

 buch der Mineralogie, C. Hintze: Contributions to Chemistry and Mineralogy 

 from the Laboratory of the IT. S. Geological Survey, F. W. Clarke : Johnstono- 

 tite, a supposed new Garnet, W. A. Macleod and 0. E. White, 469. 



Miscellaneous Scientific Intelligence — Annual Report of the Board of Regents of 

 the Smithsonian Institution showing the operations, expenditures and condition 

 of the Institution for the Tear ending June 30, 1898, S. P. Langlet, 469. — 

 Report of the U. S. National Museum under the direction of the Smithsonian 

 Institution for the year ending June 30, 1898, 470. — Publications of the Earth- 

 quake Investigation Committee in Foreign Languages, H. Nagaoka, 471. — 

 Bulletin of the University of Nebraska: National Academy of Sciences, 472. 



Index to Volume X, 473. 



