406 



ANNUAL OF SCIENTIFIC DISCOVERY. 



Microscope, new mode of facilitating 



the dissection of objects under, 145 



Microscopes, comparative value of 



various, 146 



" Spencer's American, 147 



Mineral theory of Liebig, 226 



Minerals, artificial formation of, 170 



Minot's rock lighthouse, destruction 



of, 67 



Mirrors, construction of for reflecting 



telescopes, 141 



Mitchel's, Prof., system of astronomi- 

 cal observations, 385 

 Model of the earth, Wyld's, 



" of a man, expanding, 93 



Mollusca, sexes and habits of some 



acephalous bivalve, 346 



Monument, Bunker Hill, effect of heat 



upon its perpendicularity, 143 



Moisture of the atmosphere, new 



method of determining, 234 



Muck and peat, 



MURCHISON, SIR ROBERT, 297 



Musket, cost of at the U. S. Armory, 



at Springfield, 59 



Muskets, manufactory of at the Na- 

 tional Armory, at Springfield, 57 

 NASMYTH, MR. J., 25, 119, 178, 3S4 

 Nasmyth's absolute safety-valve, 25 

 Nature and source of the sun's light 



and heat, 118 



Navigation and ship-building in the 



U. S. 30 



Near-sightedness, remedy for, 363 



NIEPCE, M. 127, 133 



Nile mud, fertility of, 227 



Nitrates and nitrites, test for, 212 



Nitric acid, new test for, 211 



Nitrogen, sulphide of, 220 



Nomenclature, chemical, of organic 



compounds, 169 



NORTON, PROF. J. P., 223 



Nova motive, 26 



Novel method of sinking piles, 65 



" rudder of a ship, 

 Oil, influence of on water, 198 



" lubricatinsr, for machinery, 198 



" coal, rectified, 201 



OLMSTEAD, PROF. D., 380 



Opium, test for, 213 



trade, ' 



Oregon, coal in, 



Organic bases, molecular structure of, 229 

 " bodies, effect of high-pressure 



steam on, 230 



Origin and existence of man and the 



cotemporaneous animals, 356 



OWEN, DR. I). D., 302, 312 



Oxygen, magnetism of, 113 



new method of determining 



the amount in the atmosphere, 232 



Oxygen, new method of obtaining from 



the atmosphere, 231 



Ozone, observations on, 241 



" Schonbeiu'a, 236 



Ozonic odor, produced by the attrition 



of siliceous surfaces, 239 



PAGE, PROF., 76. 99, 100 



Paper, patent safety, 187 



Pavements, iron, 42 



PAXTON, SIR JOSEPH, 2, 4, 5, 6 



Paxton's improvements in horticultu- 

 ral buildings, 2 

 Peat and muck, 228 

 Pendulum, demonstration of the rota- 

 tion of the earth by 

 means of, 155 

 " demonstration of the rota- 

 tion of the earth by 

 means of two, 158 

 self-adjusting, 76 

 Percussion caps, machine for the man- 

 ufacture of, 57 

 Phenomena, registration of periodical, 339 

 Pholas Dactylus, boring power of, 348 

 Phosphoric acid, quantitative separa- 

 tion and determina- 

 tion of, 217 

 volatility of in acid 

 solutions, 217 

 Phosphorus, new allotropic modifica- 

 tion of, 218 

 Photographic images, instantaneous, 131 

 Photography, guttapercha in, use of, 133 

 " improvements in, 131 

 PIERCE, PROF. B., 82, 374 

 Piles, foundation, pneumatic, 64 

 " novel method of sinking, 65 

 " sustaining power of, 67 

 Pin manufacture in the U. S. 83 

 Pitchstoneof Lake Superior, 295 

 Planets, new, discovered in 1851, 373 

 Plants, absorption of inorganic poi- 

 sons by, 328 

 " arsenic in, 215 

 influence of the poison of the 



rattlesnake upon, 336 



" and vegetables, freezing of, 329 

 Platinoid metals, 177 



Platinum, scarcity of, 299 



Plough, proper form of the mould- 

 board of, 162 

 PLUCKER, M. 113 

 Poisons, mineral, presence of in the 



nervous system, 215 



Polarized light, Arago on, 121 



Polarization of the chemical rays of 



light, 121 



Polynesia, rapid decrease of popula- 

 tion in, 358 

 Porpoise, white, economical use of 



the skin of, 



Potato disease, origin of, 

 Potash and soda, separation of, 217 



Powders, new method of preparing to 



be used in medicine, 231 



Preservation of bodies, 202 



Printing, imperial establishment at 



Vienna, 75 



" press, improved, 

 Pump, Gwynne's centrifugal, 63 



Quicksilver mines of California, 

 Quinine, substitutes for, 

 Railroad cars, improvements in, 



" wrought-iron, 48 



" check signal, 

 improvement, 

 " switch, self-adjusting, 29 



