GENERAL IXDEX. 



389 



Oceanic currents, 159 



Ocean, cause of phosphorescence in, 308 

 Occurrence of rare minerals in the Unit- 

 ed States, 273 

 Ochre, plumbic, from Mexico, 274 

 Oersted, Prof., 208 

 Ohio, suspension bridge over, 13 

 Oil manufacture in Cincinnati, 97 

 Old crater of Kilauea, 235 

 Old red sandstone, footprints in, 281 

 Oneidas, monument of, 301 

 Optic axes of crystals, magnetic rela- 

 tions of, 131 

 Optical instrument, new, 147 

 Oregon, infusorial deposits in, 288 

 Origin of sugar in the animal economy, 174 

 Organic matter in water, 202 

 Ovules in the male of plants and ani- 

 mals, 302 

 Owen, Prof., 95, 318 

 Oxidation of iron, method of preventing, 89 

 Oysters, sexes in, 324 

 Ozone, 217 

 " in the atmosphere, method of de- 

 termining, 219 

 Pacific, coal formations on, 266 

 geology of, 238 

 Paddles, number of, in steamers, 31 

 lk thickness of, 31 

 of steamers, 30 

 Paddle-wheel, new vertical-dipping, 32 

 " " new, 32 

 Page, Prof. G. G., 108 

 Paint, Blake's fire-proof, 93 

 " discovery in the preparation of, 214 

 " new, 94 

 Paper, improved bank- note, 64 

 Parachutes, use of, in mines, 68 

 Parasites, dental, 320 

 Parchappe, M., 331 

 Paris, subterranean map of, 3i56 

 Parkhurst, S. R., 60 

 Patent hot-air hexagonal biscuits, 62 

 Peat charcoal, deodorizing powers of, 215 

 Peculiarities of flowers, 297 

 Peirce, Prof. B., 338, 343 

 Pens, gold, fraud in, 93 

 Pennsylvania, bone caves of, 276 

 Central R. R., iron-arch- 

 ed bridge on, 14 

 Percussion caps, machine for making, 47 

 Perry, Geo. W.,' 56 

 Pesth, suspension bridge at, 22 

 Peterm;mn, Augustus, 246 

 Phenomena, new, of light and actinism, 144 

 " of the Daguerreotype pro- 

 cess, 140 

 Phenomenon, electrical, ^ 117 

 Phosphorescence in the ocean, cause of, 308 

 Phosphoric acid, to determine the quan- 

 tity of, in soils, 179 

 Phosphorus in iron, 207 

 Photographometer, the, 140, 143 

 Photographs, colored, 140 

 Physiological acoustics, 150 

 Piassaba, 298 

 Picker, loom, new, 54 

 Pictures on glass, 142 

 Pillar of salt, 237 

 Pindur, motion of the glacier of, 251 



33* 



Pipes, cast-iron, 79 



chain, for telegraphs under water, 48 



" lead, acfion of water on, 199 



" sheet-iron, 79 



Piquot, M. Lamare, 324 



Planet Hygea, 341 



Planets, dates of the discovery of, 342 



Plant, oat, inorganic constituents of, 180 



" polar, 291 



Plants, action of carbonic acid on, 298 



" directions assumed by, 289 



Plating by heat, 91 



" discovery in, 120 



Platinum and diamonds in California, 260 



Pleasanton, Mr., 71 



Plough, steam, 61 



PI ticker, M., 131 



Plumbic ochre from Mexico, 274; 



Poisonous bites, cauterizing of, 331 



Poison of spiders, 332 



Polarity, crystalline, of bismuth, 132 



Polarization of galvanic light, 108 



" of heat, 139 



Ponds, fresh-water, formation of, on the 



coast, 249 



Porter, J. A., 180 



Port wine, adulteration of, 185 



Post-office stamp, 55 



Potato, substitute for, 299 



" sugar, 173 

 Potatoes, to separate different qualities 



of, 161 



Power, conducting, of liquids, 111 



" " of flame, 112 

 Power of iron to resist compression and 



extension, 81 



" mechanical, ice made by, 76 



" new motive, 29 



Power-loom, inventor of, 52 



Preparation of indigo as a dye, 176 



of paint, discovery in, 214 



Preserving milk, method of, 185 



Preventing the oxidation of iron, 89 



Prevention of mine accidents, 66 



" of smoky chimneys, 63 



Prime meridian, American, 339 



Prince, W. R., 301 



Pring, Dr. f., 308 



Printing, chernitypc, 58 



Printing-press, Hoe's, 56 



Printing wall-paper, machine for, 58 



Prismatic spectrum in the electric light, 105 



Process, Daguerreotype, phenomena of 



the, 140 

 new, for manufacturing alka- 

 lies, 210 

 Production of gas, new material for, 194 

 of heat by magnetism, 138 

 of lightning by rain, 118 

 of sugar in the urine by 



wounding the brain, 174 



Prognostications of the weather, 349 



Progress of the survey of the coast of 



the United States, 351 

 Propagation of electricity in gaseous 



bodies, 111 

 Protoxide, liquid, of nitrogen, 



Public buildings, cost of, 366 

 Puddling iron, improvements in, 



Pump, floating filtering, 56 



