472 



Index. 



Musket, advantages of, over the 1)017,114 

 Mussel, how does it spin its byssus, 217. 

 Mytilus edulis (mussel). 218. 

 Mysis vulgaris In brackish water, 32. ' 

 Myxogastres, active spores of, 148. 



Natica, teeth of, 07. 

 Natterjack toad in Ireland, 227. 

 Natural selection applied to the human 



races, 223. 

 Natural history, recreations in. 351. 

 Negative evidence, illustration of, 145. 

 Nerve cells of the fro?, 375. 

 Nest of sticklebacks, 4. 

 Neuroptera, 307. 

 Nevada territory, silicious springs in, 



299. 

 Nights, unequal, in different latitudes, 



98. 

 Nile, sources of the, 63. 

 Nile, lecture on the sources of the, 



378. 

 Nile, the, in early ages, 146. 

 Nitrogen, chief sources of, 274. 

 North Cape on a June midnight, 105. 

 Nostoc, 13. 

 Notes and memoranda, 64, 115, 225, 



304, 383, 465. 



Oak, silk-forming larva feeding on, 143. 



Oak, silkworms of the, 384. 



Observatory, the K.omsey, 415. 



Observatory, a cheap, 241. 



GSdogonium infesting eggs of fish, 147. 



Oogonium, origin of the term, 1 19. 



Oolite, great crocodile of the, 385. 



Oils, preparation of essential, 63. 



Open-air exercise and longevity, 221. 



Optical ghosts, 34. 



Optical properties of organic bodies, 

 223. 



Ordeal bean, moth of the, 385. 



Ordnance, rilled, 120. 



Orgunic bodies and their optical pro- 

 perties, 223. 



Ornaments, ancient, found in Switzer- 

 land, 170. 



Orthotrichum diaphanum, 261. 



Oscillatoria in ice, 51. 



O-eillutoria found on salt mar-hos, 28. 



Oscillation, phenomenon of, 2M. 



Ostraeion qundricornis (four-honied 



trunk flah), in-:. 

 Oxygen, vicwH of Clausius on, 806. 



Oxygen in vein", injection of, 14.6. 



rs, cultivation of, 864, 

 Ozone and antozone, 306. 

 Ozone and ozone test*, 160. 

 Ozone, production of, 305. 



Palates of mollusca, obtaining, 305. 



Patomon varians in brackish water, 

 32. 



Pteonians, an ancient race called, 174. 



Paper, albumenized, 23 I ; waxed, 235. 



Papilionidse, phenomena of variation 

 in, 300. 



Parasites, egg, and their relatives, 147. 



Pass, new, over the Andes, 383. 



Patella athletica, teeth of, 70. 



Pedicle of lamp shell, importance of 

 cables of, 216. 



Pen y llvvyn, Welsh name for missel 

 thrush, 20. 



Perches, poison organs in, 253. 



Peronospora, active spores of, 148. 



Permian rocks of the north-west of 

 England, 144. 



Permeability of metals, 226. 



Pernis on the coast of Saintonge, 30. 



Peziza, genera resembling, 2. 



Pharmaceutical SociiiTr. — Prepara- 

 tion of essential oils, 63. 



Photography. —Its history, position, 

 and prospects — Part I. History of 

 photography, 153. 



Photographic processes, 233. 



Photographic engraving, 239. 



Photographs, coloration of, 239. 



Photolithography, 239. 



Photoheliographai, Kcw, 323. 



Photography with textile fabrics, 237. 



Phosphates used in agriculture, 273. 



Phr\gancida> (Caddis flies), 16. 



Physical science, foundations of, 185. 



Pig iron, 422. 



Pile works of the Swiss lakes, 171. 



Pisciculture, study of, 7. 



Planet, the 80th, 306. 



Planorbis albus, teeth of, 71. 



Plan I ago, species of, on salt marshes, 

 27. 



Platinotype, the, 237. 



Platycerium alcicorne (fern), 335. 



Podophry a ovata and piriformis, 344. 



Poison, insensibility to, 385. 



Poison organs in fishes, discovery of,253. 



Pollen, conservation of, 465. 



Polytriohum beroyniciun, 11. 



Pontoporeia atlinis identical with ma- 

 rine crustacea, 33. 



Porcelain and lavas, action of, on gases, 

 226. 



Poroellio, habits of, 81. 



Portable equatoreals, 1G6. 



Potamageton eaten by cows, 19. 



Potash, new source of, 225. 



Pottia mosses and Bpecies described, 11. 



Power of God in the animal creation, 



156. 

 Proceedings of Learned Societies, 62, 



141, 221, 299, 380, 457. 



