INDEX. 



509 



and bromaurates, 157; crystallogra- 

 phy of cesium-mercuric halides, 311 ; 

 crystallographic notes, 381. 

 Penrose, R. A. F., Geol. surrey of Ar- 

 kansas, 4:28. 



Philippson, A., geology of the Peloponne- 

 sus, part II, 79. 



Phinney, J. I., rubidium determined by 

 the spectroscope, 392. 



Phosphates of Florida, South Carolina, 

 and Canada, Millar, 342. 



Photography, color, Lippmann, 75, 499; 

 Vogel, 423. 



Physical and chemical phenomena at 

 very low temperatures, Pictet, 253. 



Physics, advanced course, Barker, -426. 



Preston, H. L., meteorite, Washington 

 Co., Kansas, 400 ; new meteorite from 

 Kenton Co., Kentucky, 163. 



Procter, J. R., Kentucky, Geol. survey, 

 77. 



Prosser, C. S., Devonian system of east- 

 ern Pennsylvania, 210. 



R 



Radiation between 15° C and 100° C, 

 discussion of formulas for, Stevens, 

 431. 

 Riggs, R. B., separation of magnesium 

 chloride from the chlorides of sodium 

 and potassium, 103. 

 Roces — 



Diabase of N. Jersey, contact phe- 

 nomena, Andreas and Osaim, 500. 

 Elseolite -syenite of Litchfield, Me., etc., 



Bayley, 500. 

 Eruptive rocks, Yellowstone Nat. 



Park, Iddings, 429. 

 Granite of Durbach, Sauer, 429. 

 Igneous rocks, origin, Iddings, 257. 

 Lavas of Mt. Ingalls, California, Tur- 

 ner, 455. 

 Mica-peridotite, Kentucky, 286. ' 

 Ottrelite in a metamorphic conglom- 

 erate in the Green Mts., Whittle, 

 270. 

 Yolcanic rocks of South Mt., Penn- 

 sylvania, G H. Williams, 482. 

 Rood. O. N., color system, 263. 

 Royal Society of London, Catalogue of 



scientific papers. 1874-1883, 170. 

 Ruhmkorff coil, discharge, Moll, 73. 



Sauer, A., granite of Durbach, 429. 

 Scott, W. B., Osteology of Poebrotheri- 



um, 428. 

 Self-induction and static capacity in a 



conductor, Bedell and Crehore, 389. 

 Silver, see Chemistry. 



Smith, R. A., Geoi. survey of Alabama, 

 1892, 78, 427. 



Smock. J. C, New Jersey Geol. report, 

 1891, 77. 



Specific inductive capacity of a dielectric, 

 Trouton and Lilly, 254. 



Spencer, J., Theoretical Mechanics, 256. 



Stevens, W LeC. comparison of form- 

 ulas for total radiation, 431. 



Surface tension and chemical constitu- 

 tion of liquids, Linebarger, 83. 



T 



Tarr, R. S., origin of terraces in gla- 

 ciated regions, 59. 



Temperature of the circumpolar region, 

 430. 



Temperatures, measurments of high, Hol- 

 born and Wien, 499. 



Texas Geol. survey, Dumble, 427. 



Thermal variation of viscosity and elec- 

 trolytic resistance. Barus, 255. 



Thwing, C. B., photographic mapping 

 the magnetic-field, 374. 



Tin and iron, alloys of, Headden, 464. 



Trowbridge, J., physical abstracts, 75, 

 253, 423, 498. 



Turner, H. W., glacial pot-holes in Cali- 

 fornia, 453 ; lavas of Mt. Ingalls, Cali- 

 fornia, 455. 



IT 



Uhler, P. R., Albirupean studies, 333. 

 Ultra red rays, dispersion, Rubens, 76. 



Vapor density under diminished pres- 

 sure, Schall, 72. 

 Vision, persistence of, Ferry, 192. 

 Volcanic, see Geology. 



w 



Walcott, C. D., Cambrian rocks of Vir- 

 ginia, etc., 52 ; Cambrian rocks of 

 Pennsylvania and Maryland, 469. 



Washington Philosophical Society, Bulle- 

 tin, 258. 



Wells, B. L., alkali-metal pentahalides, 

 42; herderite from Hebron, Me., 114; 

 double halides of silver aud the alkali- 

 metals, 155; caesium and rubidium 

 chloraurates and bromaurates, 157; 

 cassium-mercuric halides, 221. 



Wheeler, H. L., alkali-metal pentaha- 

 lides, 42; alkaline iodates, 123; 

 double halides of silver and the alkali- 

 metals, 1 55 ; caesium and rubidium 

 chloraurates and bromaurates, 157. 



