648 



INDEX. 



Periodicity of rainfall, 87. 



of .severe winters, 115. 

 Perisse', Mr. S., 401. 

 Pernot's furnace, cclxiv. 

 Peronospora infest an s, cxliii., ccxiii., 395. 

 Peroxide for hair, 445. 



of hydrogen, 230. 

 Perry, Mr., xxxiv. 

 Peru, new guano deposits of, 382. 

 Peschel, Dr. Oscar, 595. 

 Petermanu, Dr., 89. 

 Peters, Prof. C. H.F..5S. 

 Petit, Dr., clxxi. 

 Pe'titot, Pere, cli., cliv., clxiv. 

 Petroleum, a new product from, 534. 

 furnace, cclxix. 

 in North Germany, 240. 

 Petroleum-gas, cclxx. 

 Pettee, Mr., 303. 

 Petter, Mr., 370. 

 Pezophaps solitarius, ccv. 

 Pfaff, Mr.,xliii. 

 Phe'ue', Mr. J. S., clxxii. 

 Phenomena in stone quarries, 238. 



of comets, 22. 

 Phenomenon during the forging of me- 

 tallic bars, new, 4(53. 

 Philippi, Dr., clxx. 



Philippine Islands, gold-mining in, 474. 

 Phillips, Mr. J. Arthur, ex. 

 Phipson, Dr., 10, 124, 210. 

 Phosphate of lime in coffins, 310. 

 Phosphates in poor soil, 404. 

 Phosphor-bronzes, new, 535, 558. 

 Phosphorescence of phosphorus, 141. 

 Phosphorus, action of electricity on, 160. 

 in olive-oil, 445. 

 phosphorescence of, 141. 

 steel, eclxiii. 

 Photographing the waves, 103. 

 Photographs of stellar spectra, 11. 

 paste for, 523. 



taken by nitric-oxide lamps, 

 444. 

 Photography, advances in, 517. 



lamp for, eclxxxviii. 

 oil-lamp for, 517. 

 Photometers, new, 145. 

 Photometry, celestial, 1S2. 

 Photostereotypy, 557. 

 Phylica arborea, 363. 



Phylloxera, spread of, caused by the de- 

 struction of small birds, 389. 

 sulphocarbonates against, 3SS. 

 Physical anthropology, clxxii., 21. 

 Physics, xlii. 



of the globe, xxxiii. 

 Physiological action of light, 315. 



chemistry, xcii. 

 Pickering & Strange, Messrs., xxiw, lxi., 

 lxxv. 

 & Williams, Messrs., lxiii. 

 Pico Blanco, highest peak in Costa Rica, 



241. 

 Picric acid, 479. 



a test for albumen, 568. 

 Picte, Mr. , 42. 

 Pierce, Mr., xciii. 

 Pierre, Mr. Isidore, 379. 

 Pietra, Mr. Santa, 566. 

 Pietrement, Mr., clxxii. 

 Pig-iron in the United States, 459. 

 Pigment scales of the blood, 319. 

 Pigott, Dr., exxxix., 1S7, 189. 



Pilocarpus pennatiflora, 563. 



primatus, 570. 

 Pike, largest, ever taken in England, 346. 

 Pike, Mr., 413. 



Pike's Peak, thunderstorms at, 80. 

 Pinart, Alphonse L., cli., clxiv. 

 Pincus, Dr., 215. 

 Pine-cones for ornaments, 457. 

 Pinner, Mr., lxxxix. 

 Pirona and Taramelli, Professors, 66. 

 Piscicultural prizes, 425. 

 Pisciculture and the fisheries, ccxxiv.,405. 

 Pittsburgh gas-works, eclxviii. 



time arrangement, 3, 60. 

 Planet Mercury, reflecting power of the, 18. 

 Planetary perturbations, computing, 43. 

 Planets, drawings of, xxvii. 



intramercurial, xxvii. 

 the, xxv. 

 Plant, a carnivorous, 374. 

 Plantamour, Prof., 99, 251. 

 Plants, absorption of oxygen in the dark 

 by, 305. 



chemical composition of, 372. 



fly-catching, 350. 



insectivorous, ccx. 



iodine and bromine in fresh-water, 

 370. 



organic substance in, 370. 

 Plaster and lime, 519. 



of Paris, hardening of, 519. 

 setting of, 224. 

 Plateau, Mr., 189, 312. 

 Plath, Dr. Joh. Heinrich, 595. 

 Plating with aluminium, 537. 

 Platinum, imitations of magnetic, 206. 

 Plat trier, Mr., 452. 

 Ploix, Mr., 76. 

 Plum-pockets, ccxiii. 

 Pockington, Mr., xlv. 

 Poey, Mr., 117. 

 Poggeudorff, Mr., 199. 

 Pogson, Mr., 49. 

 Pogson's comet, xxix. 

 Poisonous properties of alcohol, 559. 

 Pola, Dr., 204. 

 "Polaris," pay to the survivors of the, 



587. 

 Polariscope, new, lxix. 

 Polarizations of light, elliptic, 140. 

 Pole, Mr., lii. 

 Polishing cloth for brass, 544. 



paper, Gaudiu's, 538. 

 Poljakow, Mr., 255. 

 Polynesia, clxiii. 

 Polyp, gigantic hydroid, clxxix. 

 Polyporus officinalis, 371. 

 Pomoli, Herr, clxix. 

 Pononiareff, Mr., xci. 

 Ponsard system of making steel, 461. 

 Population of the earth, 575. 

 Porcelain, decorating by pate sur pate, 521. 

 Porter, Mr. B. B.,413. 

 Poske, Mr., 130. 

 Potash and soda in milk, 233. 



in the animal body, 233. 

 Potato blight, history of the, 392. 



disease, 392, 395. 



rot, ccxiii. 



Fallow on the, 393. 

 Potentilla anserina, 362. 

 Pot-holes, or giant kettles, 235. 

 Potsdam, new observatory at, for studying 

 the sun, xxii. 



