INDEX. 



657 



Pelomyxa, the fresh-water, cxxxxi. 

 Pendulum, the horizontal, 107. 

 Pengelly, Mr., cxix. 

 Penikese, the Anderson School at, 576, 



57S. 

 Pennsylvania, geological survey of, 230. 

 Historical Society of, 5S0. 

 Percy, Dr., 170. 

 Perez, Mr., cxlv. 

 Perkin, Mr., lv. 

 Perlewitz, Mr., 1. 



Permanganate of potash and sulphuric 



acid, 201. 

 for cleaning 

 sponges, 450. 

 Peronospora infestans, 407. 

 Perrier, Mr., 250. 

 Persian insect-powder, 393. 

 Personal error, measurement of, xxiv. 

 Pertuisset, Mr., xciii., 257. 

 Perturbations, computation of, 11. 

 Peru, new guano deposits, 230, 3S3. 



resources of, 403. 

 Pestalozzi, Mr.,238. 

 Petermann, Mr., xxxvi. 

 Peters, Prof., 7. 



Prof. W.,clvi., 305, 350. 

 Petersen & Soxhlet, Messrs., 2S0. 

 Petrolate, a new fuel, 474. 

 Petroleum against moss, 454. 



flames, extinction of, 431. 

 motor, 473. 

 Pettenhoffer & Voit, Messrs., 390. 

 Pezophaps solitaria, 258. 

 Pflucker y Rico, Don Julio, 464. 

 Pfyffer's chart, 237. 

 Phenate of ammonia, therapeutic virtues 



of, 557. 

 Phenomena of the black drop, 145. 

 Philadelphia Academy of Natural Scien- 

 ces, report of the, 5S6. 

 National Museum of, 5S7. 

 Zoological Society of, 587. 

 Phillips, Mr., lxxiv. 



Prof. John, 615. 

 Phipson, Mr., clii. 

 Phosphate of lime added to the food of 



lambs, 390. 

 Phosphor-bronze, clxxviii. 

 Phosphorescence of decaying wood, 358. 

 Phosphorescent organs investigated, cli. 

 Phosphorus steel, 210. 

 Photo-engraving, 487. 

 Photographic dry plates, preparation by 

 daylight of, 529. 

 irradiation, 543. 

 multiplication of drawings, 



488. 

 printing without a press, 



492. 

 tracing-paper, 4S9. 

 Photographs of the solar spectrum, 13. 

 Photography, object-glasses for, 530. 



of the solar protuberances, 



529. 

 submarine, 531. 

 Photometric flame, 142. 

 Photo-stereotyping, 4S5. 

 Phylloxera and its parasites, 395. 

 study of, clii., clix. 

 sulphide of carbon agaiust, 



395. 

 the result of disease, 396. 

 Physical geography of Chile, 113. 



Physical laboratory at Oxford, new, 598. 

 Observatory at St. Petersburg, 76. 

 peculiarities, hereditary, 295. 

 Physics, 125. 



of the globe, xxxi. 

 Physiological action of ozone, 563. 



chemistry, hi. 

 Physiology of dyspepsia, 56S. 

 Pickering, Prof., 141. 

 Picric acid iu beer, detection of, 440. 

 Picro-carminate of ammonia, cii. 

 Pigmies of the tribe of Acca, exxxi. 

 Pigott, Dr., cix. 



Pigs, meat-flour as food for, 417. 

 Pike, Col. Nicholas, 5S0. 

 Pilcher, Dr. Aloys, 615. 

 Pinart, Mr. Alphouse, 246. 

 Pine for making brilliant gas, 431. 

 Pinner, Mr., liv. 

 Pirsch-Baudoin, Mr., 512. 

 Pisciculture and the fisheries, 419. 

 Pitcher-plants, 372. 

 Planchon, Mr., clix., 395. 

 Planets, rotation of the, 26. 

 Planimeter, Amsler's, 4S3. 

 Plants, aluminium in, 217. 

 carnivorous, 372. 

 effect of carbonic acid and oxygen 



on the growth of, 370. 

 electrical phenomena in, 355. 

 of the Wilkes Exploring Expedi- 

 tion, report on the, 374. 

 ornamental window, 363. 

 physiological classification of, 366. 

 Plaster casts, improved, 493. 



of Paris and marsh-mallow root, 

 535. 

 Plastic carbon for filters, 450. 

 Plastiliue for modeling, 494. 

 Plateau, Prof., xxxvii., cxlix., 12S, 137. 

 Plateau's glyceric liquid, 137. 



researches on liquid films, 128. 

 Plath, Dr. Johann Heinrich, 615. 

 Platinum in the gas-burner, 430. 

 melting, 211. 



the expansion-coefficient of, in- 

 creased by hammering, 198. 

 Platygonus compressus. 323, 340. 

 Plumb-line, local deviations of the, 251. 

 Poey, Prof.,9S. 

 Pogliaui, Mr., 474. 

 Pogson,Mr., xxiv. 

 Poh], Mr., 440. 

 Poison for rats, 398. 



of Egyptian serpents, 323. 

 of the water lizard, 309. 

 Poisoning with aniline red, 570. 

 Poisonous superphosphates, 412. 

 Poisson, Mr., 149. 

 Poland, mammoth cave in, 297. 

 Polar Exploration, German Society for, 

 253. 

 sea and arctic continent, 252. 

 Polaris party rescued, 610. 

 Polarization by diffusion, 138. 



in liquids free from gas, gal- 

 vanic, 139. 

 of flames, 138. 

 of light, elliptic, 137. 

 of the zodiacal light, 32. 

 Polishing powder for gold, 5'_'0. 

 Pollen in the atmosphere, 356. 

 Pompeian antiquities, 40. 

 Ponsard's system, clxxvi, 



