INDEX 



351 



Mines, heat in 75 



" ventilation of 76 



Mineral caoutchouc 223 



Mining 245 



Mixture, freezing 170 



" frigoritic 169 



" of gas and air 94 



Mice, singing 301 



Missouri Kiver suspension bridge... 47 

 Milk, composition of in different 



animals 302 



Moss rubber inking roller 131 



Moncrieff, system of 112 



Molybdenum and chromium 223 



Mound-builders 339 



Moon, height of mountains in the. .,331 

 Monuments, aboriginal, in Canada,. 28G 



Mountains in the moon 331 



Mosasauroid reptiles 255 



Moon's surface, heat reflected from, 188 

 " radiation of heat from the. .187 

 Monstrosities, artificial production 



of. 280 



Monckhoven's new artificial light... 176 



Mountains, ascent of high 274 



Monuments, megalithic 304 



Molluscs, organ of hearing in 302 



Naphtha as fuel for locomotives 38 



Natives of Vancouver's island 303 



Natural selection in the case of 



man 283 



New Thames tunnel 56 



'* oxygen process 71 



Newest coloring matters 82 



Nebraska, vertebrate remains in. . . .254 



New base 231 



" method of dyeing a fast gray. .207 



*' coloring matter 206 



" sulphuric acid 217 



" dve from madder 206 



" alloy 134 



" mode of firing gun-cotton 124 



*' property of gun-cotton 126 



Nitro-glycerine, safety 132 



Nitrogen, preparation of 226 



Nitrates, test for 230 



Nitre, formation of 228 



Norwegian boxes of felt for cook- 

 ing 60 



North Pole, best route to the 250 



Nobert's band, photographs of 192 



Nodular phosphates of ijouth Caro- 

 lina 247 



Non-explosive powder 227 



Nomades, westerly drifting of 304 



Obituary of men eminent in science, 



1869 344 



Obsidian 262 



Observations of the eclipse 310 



Ocean telegraph 109 



Oils, refining vegetable 83 



Oil, figures 188 



Oreide ". 227 



Oroide, how it is made 134 



Ordnance, experiments on heavy 117 



Organisms in Hot Springs 308 



Organ, electric 86 



Oregon and Idaho, Flora and Fauna 

 of. 239 



Organic remains, veins containing.. 250 



Origin of bacteriums 301 



Organ of hearing in molluscs 302 



Oscillation of railway carriages 23 



Ovarian egg, the 300 



Oxy hydrogen light 05 



Oxygen, extraction of from the air. 202 



Oxygen process, new 71 



Oxidation of acetic acid 2.31 



Oxygen, determination of free 184 



Paper from shavings and saw-dust. . 135 



Painting, zinc 133 



Paper, how to make transparent 135 



Palliser gun 110 



Papers read at the meeting of the 



American Association 253 



Papers on the eclipse, read at the 



American Association 316 



Paper, transparent 135 



Pacific railroad time-table. 13 



Pacific coast, coal fields of the 



North 240 



Papers read at the meeting of the 



British Association 256 



Pala?ozoic rocks of Vermont 239 



Peat for locomotive fuel 37 



Pepsin 302 



Perforated implements of the stone 



period 340 



Penetration of armor-plates, by 

 shells, with heavy bursting 



charges fired obli(iuely 83 



Petroleum in the East Indies 264 



Pebbles and rock, plasticity of. 238 



Peat manufacture in Ohio 74 



Photography and Gunnery 129 



Photographs with a white surface.. .127 



Phosphorescence of the sea 190 



Photographic representations of the 



pulse 276 



Photographic paper, improved 127 



Photography, unequal effects of light 



in 144 



Phenomena in the drift near Nor- 

 wich •. 260 



Photographing without a lens 192 



Photographs of Nobert's bands 192 



Photography — self-prints from Na- 

 ture 191 



Phosphates, nodular 247 



Phosphorus, black 226 



" detection of 230 



" white 127 



Pile-driver and hammer, gunpow- 

 der 113 



Pile, chloride of silver 154 



Pile, new thermo-electric 147 



Pile, action of heat upon the electro- 

 motive force of 148 



Picrates, their use as gun and blast- 

 ing powders 125 



Plants, eva])oration by 308 



" fossil 257 



Planetary influence on rainfall and 



temperature 327 



Planet, discovery of a new 325 



Plasticity of pebbles and rocks 238 



Platinum in Scotland 227 



Poisonous gases, method of detect- 

 ing > 69 



