Index. 



489 



Oxygen economically produced for in- 

 dustrial purposes, 474. 



Oxygen or chlorine, new process for 

 obtaining, 229. 



Oxy hydrogen lime light, 226. 



Oysters, 162. 



Oysters on mangrove trees, 6G. 



Paarl mountain, 247. 

 Paddle-wheels, 421. 

 Palladium tube, 455. 

 Palm swift's nests, 420. 

 Palm-leaf huts, 414. 

 Palythoa, 91. 



Panoramic photographs, 313. 

 Paper nautilus, 28. 

 Parachutes, 376. 

 Parasites on wheat, 264. 

 Partridges of Cape Colony, 251. 

 Passage of gases through metals, 454. 

 Parallels of heat, 114. 

 Patella, 19. 



Patella, or rock limpet, 163. 

 Pearl fisheries, 170. 

 Pearl producing shells, 170. 

 Pearly nautilus, 29. 

 Pecking propensities of the woodpecker, 

 323. 



Pectens, 162. 



Pelican's flight, 375. 



Penetration of gases, 454. 



Pennatula, 373. 



Permanent artistic decoration of wall 

 surfaces, 409. 



Perjury, 103. 



Petrifaction, 284. 



Petroleum lamp, new, 64. 



Petroleum in Sicily, 80. 



Phantom thumbs, 160. 



Pharos of Alexandria, 325. 



Philosophy of birds' nests, 413. 



Physical geography, 477. 



Phosphorescent spots on the moon, 51. 



Photographs, Mrs. Cameron's, 30. 



Photographic negatives, 314. 



Photographs of eminent medical men 

 of all countries, 477. 



Photography as a fine art, 30. 



Photographic instrument, 473. 



Photographing the moon, 239. 



Photography, new application of, 314. 



Photography, Eutherford's celestial, 79. 



Photography under water, 64. 



Phyllograptus, 371. 



Picus, 321. 



Picture-notes, Royal Academy, 357. 



Pigeon's nests, 416. 



Pinna, 171. 



Planet Mars, 80. 

 Plateau's liquid, 160. 



Platinum, 180. [181. 



Plating or platinizing of various metals, 



Pleasant ways in science, 136. 



Plumage of woodpeckers, 324. 



Pneumatic despatch, 474. 



Poisons of spreading diseases, 400. 



Polycrates' ring, 402. 



Polygonal lens, 327. 



Polyps of the Hyalonema, 239. 



Polyps, notes on, 84. 



Polyzoa, 373. 



Poppy, a curious anomaly, 447. 



Porcelain glazing, 396. 



Positive slip of screw propeller, 426. 



Pottery found at Penzance, 223. 



Power of birds to hear and remember, 



418. 

 Practice and procedure of the Star 



Chamber, 95. 

 Precious stones, 402. 

 Prehistoric art, 320. 

 Prehistoric remains of Denmark, 472. 

 Preparations for wall-painting, 411. 

 Preservative coatings for metals, 227. 

 Probable connection of comets with 

 shooting stars, 390. 



Proceedings of learned societies, 159, 

 238, 315, 397, 476. 



Proclus, 53. 



Production of blacks by the Daguerreo- 

 type process, 231. 



Products of volcanic action, 218. 



Production of iron from copper ore, 

 230. 



Progress of invention, 63, 156, 226, 

 310, 396, 473. 



Projection of sun's image, 431. 



Promotheus' ring, 402. [421. 



Propelling vessels, various modes of, 



Propulsion of boats and ships, 421. 



" Prospero and Miranda," by Mrs. 

 Cameron, 33. 



Protection of armour plates from cor- 

 rosion, 397. 



Pseudoscope, 476. 



Pteroceras, 20. 



Pumpkins, monstrosities, 448. 



Punishments in olden times, 107. 



Purple martin's nest, 419. 



Pyrrhus's agate, 403. 



Pyx, trials of, 10. 



" Eachel," painted by Goodall, 364. 



Eadiant forces, 136. 



Eainy season of India, 110. 



Eamble in Cape Colony, 246. 



Eamble in West Shropshire, 185, 348. 



EaniUa, 19. 



Raoulia Australis, raoulia bryoides, and 



other species, 129. 

 Eastrites, 366 

 Eays diverging, 138. 

 Eeason and instinct, 413. 

 Eed mangrove, 67. 



