35] 



VOLUMES XXXI-XL. 



539 



Phosphoro-photographs, Lommel, xl, 330. 

 Photographic dry plates, effect of stain- 

 ing upou. vii, 76; figures produced by 

 electric action ou, vii, 226. 

 halos, suppression of, ix, 520. 

 lens, Zenger, viii, 491. 

 Photography applied to flight of birds, 

 iv, 399. 



Chemistry of, Meldola, viii, 255. 

 instantaneous, ii, 481. 

 of oscillating electric sparks, Boys, 

 xl, 331. 



orthochromatic, vii, 229. 

 by phosphorescence, iii, 307. 

 pin-hole, Rayleigh, viii, 491. 

 relation of silver salts to, see Silver 

 under Chemistry. 



surface tension studied by. ix, 519. 

 by vital phosphorescence, iv, 311. 

 Photometer, Pritchard's wedge, iv, 401. 

 Piano, time of contact between hammer 



and string in, Weed, ii, 366. 

 Pickering, E. C, maps of ultra violet 

 spectrum, ii, 223; temperature and 

 heat of chemical combustion, ii, 173; 

 spectrum of C, Ursae Majoris, ix, 46. 

 Pillsbury, J. E., explorations of the G-ulf 



Stream, vi, 225. 

 Pirsson, L. V.. mordenite, xl, 232 : fow- 



lerite, New Jersey, xl, 484. 

 Pitcher, F. B., absorption spectra of 



blue solutions, vi, 332. 

 Planchon, J. E., Ampelideas, iv. 490. 

 Planetary bodies, law of densities, viii, 



393. 

 Planets, discovery of small, v, 505. 



relation of asteroid orbits to those 

 of Jupiter, i, 318. 

 Platinum, action of, on gases, iv, 64; 

 and silver, comparison of radiations 

 from melting, iv, 227. 

 Polar expedition to Point Barrow, Re- 

 port, i, 319. 

 Polarization, circular, of tartrate solu- 

 tions, Long. I, vi, 351 ; II, viii, 264 ; 

 III, xl, 275. 



by double image prisms, iii, 237. 

 galvanic, Warburg, ix, 66. 

 Portugal, geology, vi, 154. 

 Poulton, E. B., gilded chrysalides, iii, 



321. 

 Powell, J. W., Report of Bureau of Eth- 

 nology, i, 320. 

 Power, transmission of, by alternating 



electrical currents, v, 252. 

 Prantl, K., Die natiirlichen Pflanzen- 



familien, v, 259. 

 Pratt, J. H., Jr., capillary electrometer, 



v, 143. 

 Prescott, A. B., Organic Analysis, v, 

 336. 



Preston, E. D., deflection of plumb-line 

 and variations of gravity, Hawaiian 

 Is., vi, 305; measurement of the Per- 

 uvian arc, ix, 1 ; magnetic and gravity 

 observations on the west coast of 

 Africa, etc , xl, 478. 



Prestwitch, J., Geology, i, 311 ; v, 414. 



Pritchard, O, Uranometria, i, 317. 



Probst, J., Klima und Gestaltung der 

 Erdoberflache in ihrer Wechselwir- 

 kung. v, 345. 



Pumpelly, R., fossils of Littleton, N. EL, 

 v, 79. 



Purves, E. O, Geology of Antigua, i, 

 226. 



a 



Quicksilver pump, new, iii, 151. 

 R 



Radiant energy, history of, Langley, vii, 



1. See Energy. 

 Radiation in absolute measure, v, 77. 

 electric, concentration by lenses, 

 Lodge and Howard, viii, 75. 



measurement of, Hutchins, iv, 466. 

 from melting platinum and silver, 

 iv, 227. 



solar, influence on electrical phe- 

 nomena in atmosphere of earth, Ar- 

 rhenius, viii, 161. 



thermal, law of, Eerrel, viii, 3; ix, 

 137. 

 Radiophone, electro-chemical, Chaperon 



and Mercadier, vi, 153. 

 Radlkofer, L., Serjania Sapindacearum 

 Genus, monographic description, iv, 

 493. 

 Rath, G. vom, .N". Carolina minerals, iii, 



159. 

 Rattan, V., West Coast Botany, iii, 319. 

 Rayleigh, Light and Electricity, vi, 468 ; 



composition of water, vii, 492. 

 Rays, ultra-violet, disintegration of sur- 

 faces by means of, Lenard and Wolf, 

 viii, 247. 



See Light, Spectrum. 

 Reade, T. M., submarine crater in the 

 Atlantic near the Canaries, i, 226 ; 

 Origin of Mountain Ranges, iii, 240 ; 

 mountain making, v, 415; origin of 

 normal faults, ix, 51. 

 Reed, A. Z., Evolution versus Involu- 

 tion, i, 317. 

 Refraction, double, in Iceland spar, Has- 

 tings, v, 60. 



produced by metallic films, i, 

 390. 

 on electrical theory, Gibbs, v, 467. 

 Refractive indices, variation with tem- 

 perature, i, 50. 



