INDEX. 



479 



Q 



Analysis, 



Elements, 



Oklahoma, Carboniferous and Per- | 

 rnian age of the Eed Beds of, 

 Adams, 883. 



Organ-pipes, behavior of small closed 

 cylinders in, Davis, 185. 



Paraffins, dielectric constant of, 

 Hormell, 433. 



Peckham, H. E., bituminous deposits 

 of Cuba, 33. 



Penfield, S. L., calaverite, 225 ; Con- 

 tributions to Mineralogy and Petro- 

 graphy from Sheffield Scientific 

 School, 398. 



Perkin, F. M., Qualitative Chemical 

 Analysis, 76. 



Peters, C. A., calcium, strontium 

 and barium, estimation of, 216 ; 

 determination of persulphates, 367. 



Phasenlehre, die heterogenen Gleich- 

 gewichte vom Standpunkte der, 

 Eoozeboom, 463. 



Phosphorus, effect of temperature 

 and moisture on the emanation of, 

 Barus, 327. 



Photometry of the ultra-violet rays, 

 Kreusler, 463. 



Pirsson, L. V., geology of laccoliths 

 in High wood Mts.. Montana, 1; 

 Contributions to Mineralogy and 

 Petrography from Sheffield Scien- 

 tific School, 398. 



Porto Rico, reports on Fauna, 471. 



Pulman, O. S., Jr., molybdic acid 

 reduced by hyclriodic acid, 449. 



Qualitative 



Noyes, 462. 

 — — Laboratory Guide to, Bailey 



and Cady, 462. 



Radio-activity produced by salts of 



radium, Curie and Debierne, 319. 

 — of lead, Hofmann and Strauss, 388. 

 Resistance, effect on, of amalgamated 



gases, Eollins, 322. 

 Rhees, W. J., Origin and History of 



the Smithsonian Institution, 473. , 

 Robinson, H. H,, octahedrite and 



brookite from No. Carolina, 180. 



ROCKS. 



Corundum-syenite and eleolite- 

 syenite containing graphite, Ma- 

 dras, Holland, 467. 



Igneous rocks, classification, von 

 Federov, 83. 



— of Cameroon Mts., Esch, 81. 

 Laccoliths of Highwood Mts., Mon- 

 tana, Weed and Pirsson, 1. 

 Kedabekite, 247. 

 Kenyte, 247. 

 Melaphyre of Boston Basin, Burr, 



79. 

 Peridotite, altered, 468. 

 Perknite, Turner, 468. 



Rogers, A. F., mineralogical notes, 

 42. 



Rollins, W., effect of amalgamated 

 gases on resistance, 322. 



Rood, O. N., experiments on high 

 electrical resistance, part II, 91. 



Roozeboom, H. W. B., die hetero- 

 genen Gleichgewichte vom Stand- 

 punkte der Phasenlehre, 463. 



Royal Society, Copley medal, 474. 



Scientia, Bohn, 89. 



Secondary undulations shown by 

 tide-gauges, Duff, 123. 



Seeley, H. G., Dragons of the Air, 

 396. 



Shepherd, W. K., new solution for 

 copper voltameter, 49. 



Smithsonian Institution, Annual 

 Report, 473 ; Origin and History, 

 1835-1899, vol. i, Rhees, 473. 



Sound, experiments in, Davis, 185, 

 263. 



Spectra, infra-red, of the alkali- 

 metals, photography, Lehman, 390. 



Spectrum of the alternating current 

 discharge, Wright and Downs, 66. 



Stokes, H. N., pyrite and marcasite, 

 414. 



Tellurium, magnetic effects in, 

 Lloyd, 57. 



Temperature, the nadir of, and 

 allied problems, Dewar, 168. 



— Unsolved Problems of Low, 

 Gierke, 393. 



Temporary set, Barus, 247. 



Thatcher, R. W., new method of 

 quantitative analysis, 320. 



Tide-Gauge observations, Duff, 123. 



Trowbridge, J., spectra of hydro- 

 gen, 310. 



United States Geol. Survey, 21st 

 Annual Report, 465. 



Naval Observatory, publica- 

 tions, 90. 



