ixni-.x. 



Pearls and parasites, 399 

 Peat deposits. Scottish. 391 



for power purposes. Use of. 433 



Penguins breeding. SO 



Peregrine. A conveyed. 116 



Perfumery. Notes on the essential oils. 



including an account of the material 



and methods of, 454 

 I'erkins. Frank C. \-iZ, 1()S. 174 

 I'etrology at the British Association, 434 

 I 'harmacopoeia. .\n Irish, 170 

 Phosphorous. Red. 392 

 Photoelectric fatigue, 117 

 Photographic image. Reversal of the, 276 



printing papers. Spots in. 395 



Photographing coloured objects. 476 

 Photographs. The eflect of damp on, 195 

 Photographv Notes. 39. 81. 116. 158. 195, 



240, 276, 319. 347. 397. 438, 476 



Proceedings of the Optical Conven- 

 tion, I. Colour. 319 



Photo-micrographic apparatus. .\ universal 



geometric slide. 1 15 

 Society. The. 79 



micrography at a low magnification. 



241 



equivalent exposures, Low power, 



273 



for naturalists. Low power, 77 



lighting and back-grounds. Low- 

 power, 317 



of opaque objects, 438 



, The use of projection oculars in. 



319 



with high powers. 397 



medium powers. 347 



without a microscope. Low- 

 power. 112 

 Photosynthesis in algae. 108 



. Potassium and. 270 



Phthisis. Rainfall and. 36 



Physical laboratory. The National. 321 



Physics in the Encyclopaedia Britannica. 



Mathematics and. 26 

 year 1911, 41 



Notes. 40. 82. 117. 159. 196. 242, 278, 



320. 439 



Pictures and prints. A knowledge of naval, 



65 

 Pigeon, The last of the Passenger, 115 

 Planet M. T, 270 



, The interesting minor, 231 



Planets. Life on the. 84 



Plant anatomy a century ago, Molden- 



hawer's work, 341 

 Plants. Biology of salt-marsh. 271 



. Naked-eye anatomy of, 271 



, Origin of vascular, 340 



Pocock, L. C. 356 



Polar phenomena, 21 



Polydacivlv. 198 



Poole. Hubert H. 16 



Porpoise. \ white. 440 



Porthouse. William. 59 



Potash in the United States, The search 



for. 342 

 Potassium and photosynthesis, 270 



in plants. 150 



Potter, C, S. 267 



Proctor. Mr. Robertson versus Mr.. 8 



Proof plates, 320 



Proteins, Vegetable, 315 



Protura. The. 215 



Psochid. Web-spinning, 321 



Pump, An improved Toepler, 165 



Pyroticmu, Life history of, 391 



QUEKETT MICROSCOPICAL CLUB. 



38. 157, 191, 240. 275. 346. 476 

 Queries and answers, 21, 185, 267 



RADIO-ACTIVITY, 196 



active bodies, 195 



Radium. Alloys of. 271 



in the waters of Bath, 188 



Raffety, Charles W., 106 

 Rainfall and phthsis, 36 



of April. 235 



Rats. Reproduction of brown, IIS 



Rays, Sterilisation of water by ultra violet. 



33 

 Reactions, Photographic effect of chemical, 



109 

 Redgrove, H. Stanley. 85. 254, 292. 336 

 Keed warbler. The great. 346 

 Research Defence Society. The, 96 



, Special appeal from the. 



360 

 Reviews, 27, 67, 124, 162, 200, 243, 260. 

 322. 362, 406, 442, 480 



Aeronautics, 27 



.\rchaeology. 200 



.\strology, 243 



AstronoiTiv, 201, 362, 406 



Bacteriology. 260. 322, 363 



Biochemistry, 442 



Biography, 407 



Biology. 67, 260, 363, 407, 442 



Bird Migration, 162 



Botany. 202. 261, 322 



Chemistry. 27, 67, 162, 262, 407 



Cosmology. 363 



Crvstallography, 68 



Evolution, 28, 243 



CJeographv, 28 



Geology, 29, 162. 263. 324 



Heredity. 324 



Horticulture. 443 



Mathematics, 163. 325 



Medicine. 68. 244 



Metaphysics, 407 



Meteorology, 163, 325 



Microscopy, 124. 244 



Mineralogy. 69. 364 



Mycology. 443 



Natural History, 364 



Oceanography, 444 



Ornithology, 29. 203, 364 



Photographv, 480 



Physics, 69,' 163, 203. 325 



Prehistoric archaeology. 164 



Psychical research. 264 



Psychology. 124. 164. 444 



Topography, 444 



Tides, 29 



Zoology, 69, 164, 245, 264. 444, 480 

 Robertson r'ccsHs Mr. Proctor, Mr., 8 

 Rock associations. The invariability of, 152 

 Rockling. Vibratile fin of the. 477 

 Root nodules in non-leguminous plants, 340 

 Rosaceae, The " calyx-tube " of, 108 

 Rotifers. Effect of alcohol on generations 



of. 278 

 Royal Institution, The, 8, 453 

 Rubber, Some notes on the chemistry of 



india, 85 

 Kyves. Reginald, 377 



SAH.VRA, AQU.\TIC VERTEBR.\TES 



OF. 160 

 Salamander, Colour change in. 348 

 Sand dunes. New Zealand, 186 

 Saturn. 445 



Scales. Feathers and, 242 

 Scharff, R. F.. 93 

 Schaumasses Comet, 32, 72 

 Scotland, Willow- grouse in, 38 

 Scots Pine, The mechanism and use of the 



.\pophvses of the scales of the cones of 



the, 220 

 Scottish peat deposits, 391 



Screen, A blue, 343 



, .\utochrome, 278 



Sea, Resources of the, 197 



Sickness, 267 



squirts. Edible, 398 



urchin. Locomotion of. 348 



urchins. Hybridising, 198 



psdicellariae. Sensitiveness of. 118 



Seismology Notes. 160 



Selaginella. Biology of. 271 



Selborne Society's conversazione, The, 76 



Sciiccio Jacobocut , The discal florets of, 301 



Senior, Edgar. 39. 81. 116. 156. 195, 240, 



276, 319, 347. 397. 438. 476 

 Sense. The graphic expression of. 43, 101 



training, 349 



Shepherd's purse. Mutation in. 72 

 Shrews. British fossil. 41 



. Teeth of. 321 



Silica. 82 



Silicon, Amorphous, 151 



Silk. Eri. 399 



Moth. Origin of germ-cells. 160 



Siloxide. a new glass, 151 



Skeleton in glacial deposits at Ipswich, 



Human, 23-* 

 Sky, Brightness of the background of the, 



339 

 Sky. The face of the. 23, 60, 90. 133, 177, 



223, 258, 267, 313, 358, 386, 446, 471 

 Slack. H. F., 454 

 Smith. T. F., 350, 369 

 Sniyrnium. Fruit of. 190 

 Snail see ? Does a. 42 

 Snails. Locomotion in. 278 

 Tongues for the microscope. The pre- 

 paration of. 237 

 Snakes, burrs and birds. 13 

 Snow crystals. 9 

 Soar. Charles D.. 192. 436 

 Soil and the plant. The. 232 

 Solar Disturbances. 30. 59, 89, 161, 200, 



216. 250. 312, 357. 399, 441, 470 

 Soot, The composition of, 74 

 Sos, Ernest, 105 

 Spanish Peninsula, On the resemblance of 



the flora and fauna of Ireland to that of 



the, 93. 220 

 Spectra. 242 



Absorption, 439 



Resonance, 439 



Spiders. Body poison of. 243 

 Squire. D. S. B., 205 

 Star, A new, 150 



charts. How to make stereoscopic, 



221, 267 



, Stereoscopic, 359 



drifts, Prof. Turner's suggested ex- 

 planation of the two, 270 



in Gemini. The new. 186 



Starfish, Self-evisceration in a, 440 

 Stars, Spectra of faint. 339 



with common drift. Groups of. 71 



Statue, .\ colossal reinforced concrete, 168 



Stellar and nebular distances. On, 329, 373 



Sterilising soil, Effect of, 473 



Sting-rays of the Ganges, Freshwater, 399 



Stonyhurst college observatory, 198 



Stork (Cicoiiia alba) nesting in captivity. 



White. 276 

 Strachan. James, 345 



Stratigraphy at the British Association, 474 

 Strickland, Sir W. W., 301 

 Struggle for existence. Inter-specific and 



intra-specific. 83 

 Stuart. A. H.. 221 



Suherites and Dromia, Association of, 42 

 Sulphur. Fertilising action of, 233 

 Sun and its effects on vitality. The, 8 



, The, 47 



Sundew, A British insect-eating plant. The, 



166 

 Sundials, Saxon, 127 

 Sun's path in space. The, 136 

 Sweepings, 62 



