INDEX. 
455 
PAGE 
Polar World, the 174 
Popular Optics 75 
Porcelain, Hydrogen Flame-colour 
on 190 
Positivism in Chemistry 303 
Potentilla Norvegica in England ... 83 
Precious Stones, Formation of 205 
Preglacial Man 175 
Prehistoric Archaeology 311 
Preparation of Artificial Ebony ... 306 
„ of Cerium 188 
,, of EUagic Acid 189 
Pressure and Chemical Action 307 
Printing Photographs by Mechani- 
cal Means 210 
Printing-press, Use of, to Photo- 
graphers 100 
Printing-surfaces, New Method of 
Preparing 324 
Proboscis of the Blow-fiy 333 
Proctor (E. A.) on Fixed Stars 358 
„ (Mr.) on the Transit of 
Venus 297 
„ (E, A.) on Saturn, in July 
1869 252 
„ ,, on the Planet Mars 39 
„ „ on the Use of the 
Spectroscope in Astronomy 141 
Proctor’s “ Half-hours with the 
Stars.” 291 
Protoplasm of Plants, Bacteriain the 185 
Psychology, Comparative 332 
Puissieux (M.) on the Coming 
Transits 297 
Purification of Metallic Bismuths. 188 
Purkings (Prof.) death of 437 
Quadrupeds, Ciliary Muscle in 109 
Quatenary Gravels of England 90 
Queckett Club Soiree 208 
Eadiation from Steam Boilers 93 
Eailway Trains, Intercommunica- 
tion in 93 
Eed Chalk of Hunstanton 193 
Eeed (Mr.) on Ironclads 314 
Ee-establishment of Sensibility after 
Eesection of Nerves 94 
Eefraction and Temperature 217 
Eeliquse Aquitanicse 290 
Eemoval of Silver-stains 100 
Eesi stance of Armour-plates 315 
Eespiration, Influence of Pneumo- 
gastric Nerves on 200 
Eestiacese, South- African 84 
Eetina of the Hedgehog, Vascular 
Parts of the 329 
Eeviews of Books 67, 168, 284, 408 
Eichardson (B. W.) on the Mind 
and Death 275 
PAGE 
Eifle, New 313 
Eivers, Sediment of 309 
Eocks, Volcanic Organisms in 311 
Eotifera, Teeth of 330 
Eotifers, Desiccation of. 332 
Eoyal Botanic Society 423 
Eoyal Institution, Chair of Physio- 
logy at the 332 
! 
i 
I 
Saxamander, New Genus of 333 
Salt, Influence of, in Absorption ... 201 
Salvia, Fertilisation of 261 
Sandstone 194 
Sarracenia, Variation in 423 
Saturn, in July 1869 252 
Saurian Eemains, New Zealand ... 432 
Scandinavian Botany 301 
Schefiler’s “ Theory of Optical De- 
fects and of Spectacles.” 175 
Schnitzlein, Death of 183 
Science of Man, the 73 
Scientific Agriculture 415 
,, Summary 79, 178, 296,418 
Scolex of Phyllobothrium in a Dol- 
phin 106 
Scudder’s “Fossorial Crickets” 414 
Sea-bottom, Atlantic 331 
Sea-sickness 78 
Seasons, Origin of the 294 
Sea-squirts, Structure and Affinities 
of 240 
Seaweed, Coal from 319 
„ New 83 
Secondary Alcohol, New 89 
Sediment of Eivers 319 
Sensitive Albumenized Paper 100 
Sensory Impressions, Conduction 
of 97 
Sertularian Zoophytes of our Shores 223 
Sesqui-salts of Iron, Decomposition 
of 30 d 
Shadow Perspective 77 
Shell of Crustaese, Structure of. 108 
Sherwood Forest, the Birds of 295 
Shetland, the Botany of 301 
Shooting-stars, November 81 
Short-period Comet, Winnecke’s ... 298 
Shortrede’s “ Azimuth” 416- 
Sigilliana, Structure of 310 
Siliceous Sponge, New 331 
Silicic Acid, Crystalline Modifica- 
tion of 203 
Silkworm Culture 108 
Silver, Assay of, in the Wet way, 99, 202 
Silver- stains, Eemoval of 100 
Similitude of Hydraulic Trajectories 104 
Skin Tissue affected in Small-pox. 200 
: Slag, Blast-furnace, Utilization of . 318 
i Small-pox, Skin Tissue Affected in, 200 
I Smith's “ Disinfectant and Disin- 
I feetion.” 176 
