GENEKAL INDEX. 



Organs of animals, xii. 147 

 Orinoco, ix. 163 

 Orion, vii. 159 

 O'Shaughnessy, Dr., iii. 174 

 Ourang-outang, viii. 159 

 Ovens, potter's, ii. 189 

 Oxydation of metals, iii. 124 

 Oxygen gas, ii. 10 ; ib, 107 



PACHYDERMATA, viii. 158 



Paddle-wheels, x. 126 



Pairs, elements, and poles, iii. 132 



Paleozoic periods, xii. 41 



Palissy, Bernard, ii. 136 



Pallas, vi. 163 



Palm Sunday, vii. 19 



Palina, island of, xi. 107 



Pampas, the, ix. 153 



Paper, iv. 6 



Parallax, vii. 173;; xii. 167 



Paris, rain at, iii. 94 



Parliament, iv. 86 



Pascal, v. 100 



Paschal moon, vii. 16 



Passover, vii. 9 



Patterns for carpets, v. 207 



Pecari, viii. 158 



Pegasus and Andromeda, vii. 156 



Pen, electro-chemical, iv. 47 



Pendulum, iii. 59 ; vi. 6 



Peninsulas, ix. 154 



Pentamerus, the, xi. 66 



Pentecost, vii. 20 



Penumbra, earth's, xii. 182 



Periodic stars, vii. 197 



Periscopic spectacles, v. 201 



Perseus, vii. 157 



Personal identity, viii. 88 



Peru, iv. 166 



Peter hoff steamer, x. 149 



Petung-tse, ii. 130 



Phantasmagoria, i. 89 ; viii. 196 



Philiscus, x. 3 



Philosophical instruments, x. 202 



Phosphorus, ii. 11 



Photography, vi. 11 ; ib. 99 ; viii. 



207 



Photometer, vii. 189 

 Pigeons, viii. 149 

 Pigott's comet, xi. 171 

 Pilgrim, M., i. 72 

 Pilot engines, iv. 80 

 Pinion wheel, vi. 19 



202 



132 



Pirene, fountain of, iv. 167 

 Pit coal, ii. 201 

 Plague of London, ii. 78 

 Plane reflector, vii. 83 

 Planetoids, i. 64 

 Planets, i. 3; vi. 161-3 

 Plants, i. 10 

 Pliny, i. 119 

 Plutarch, iii. 167 

 Podura or spring tail, vi. 63 

 Poisson, M., i. 137 

 Polar ice, iii. 369, 380 



star, i. 102 



voyages, i. 12 



Polarised ray, ix. 60 

 Poles, the, i. 98 ; iii. 57 ; il 

 Polynesia, ix. 148 

 Pompilides, viii. 143 



Pons' comet, xi. 171 



Pontiffs, mistake of, v. 163 



Population, iii. 4 



Porcelain, Chinese, ii. 125 



Portland dirt bed, xi. 122 



Potosi, ix. 152 



Potteries, ii. 113 



Pouillet, M., iii. 126 



Pou-sa, ii. 150 



Prairies, ix. 153 



Precession of the equinoxes, v. 167 



Pressure of steam, v. 9 



Primogeniture, x. 58 



Primum mobile, iii. 55 



Principal Alps, system of, xii. 21 



Printing, ii. 165 ; xi. 1 



machines, xi. 11-16 



telegraph, iv. 56 



Prism, vii. 69 



Prismatic spectrum, vii. 67 



Pritchard, M., ix. 47 



Probabilities, ii. 73 



Procyon and Sirius, i. 120 ; vii. 162 



Propellers submerged, x. 157 



Pterocera oceani, xi. 64 



Ptolemaic system, vii. 174 



Puberty, viii. 78 



Pulsations of light, i. 203 



of electric current, iii. 188; 



iv. 18 

 Putrefaction, i. 122 

 Pyrenean basin, xii. 70 

 Pyrenees, the, ix. 187 



system of, xii. 19 



Pyrheliometer, iii. 83 

 Pyrometers, vi. 147 



