Nova Scotia, Goldfields of, W. Malcolm, 125 Oyster Shells, Evidences of Age afforded by the Growth- rings of, Miss A. L. Massy, 299 Ozarkian Seaweeds and Oolites, G. R. Wieland, 354 Objective Psychology, Pure and Applied, 142 a Method of obtaining Complete Germination Ohio University, Extensions to Buildings of, 304 Oils, Resins, and Paints, a Manual of, vol. i., Analysis and Olfactory Sense of Insects, the, Dr. N. E. McIndoo, 399; One-Million Map, the Royal Geographical Society's Work Opium in the Bible, Prof. P. Haupt, 444 Opium Poppy, on the Trail of the, Sir A. Hosie, 90 Optic Projection Principles, Prof. S. H. Gage and Dr. Orbicular Granite of Mullaghderg, Prof. G. A. J. Cole, 26 : Ordovician Eurypterid, a New, E. W. Shuler, 461 Organism, the, as a Thermodynamic Mechanism, Dr. J. Origin: of 4686" Series, T. R. Merton, 249; of Single Orion Nebula, Radial Velocities in the, Dr. E. B. Frost, Ornithological Notes, 78, 188 Ornithorhynchus, Egg of, Profs. Wilson and Hill, 653 Osiris Prize of the Institute of France, awarded to Profs. Osmotics: a Neglected Correction in, Earl of Berkeley, 34; Eggs, R. Oxford University: Bequest to Exeter College by Capt. Paintings of Old Masters, Dr. M. Toch, 45 Paints and Painting, the Chemistry of, Sir A. H. Church, Palæmons of the Philippines, the, Dr. R. P. Cowles, Palæolithic Man in South Africa, F. W. Fitzsimons, 615; Palæontology, Recent Work in, 354 Palæornis, Osteology of, Dr. R. W. Shufeldt, 582 Paleocene Deposits of the San Juan Basin, W. J. Sinclair Panama Canal, the Country, and the People, A. Bullard Papaya Fruit-fly, F. Knab and W. W. Yothers, 332 Papyrus, Applicability of, to Paper Manufacture, Dr. W. Para Rubber Trees in the Singapore Botanic Gardens, Parabolic Orbits of Meteor Streams, C. P. Olivier, 553 Paraffin-wax, Plates of, J. T. Cunningham, 167 Parasitism in Seeds, V. Galippe, 693 Paris Geographical Society, Medal awarded to Dr. J. Scott Parka decipiens, Fleming, G. Hickling, and W. R. Don, 363 Patagonia, the Deseado Formation of, Prof. F. B. Loomis, 214 Peabody: College for Teachers, Gift to the, 692; Museum, Pearl Fishery in Palk Bay, the Recent, J. Hornell, 529 Pellagra, Infectious Nature of, G. Tizzoni, 167 Pennsylvania: University of, Bequest to, by S. Dickson, Pensions Granted for the Year ended March 31, 1915, 459 Perception, Physics, and Reality, C. D. Broad, 172 S. Kemp, 304 a, Peripatus, Distribution of, A. H. Clark, 215 Peru, Explorations in, Dr. Hrdlička, 275 Pharmaco-Therapy, on, and Preventive Inoculation, Sir Pheasants and North Sea Battle, 43; Hybrid, White-collar Photographic: Effect of Recoil Atoms, A. B. Wood and Photographs of the Milky Way and of Comets, by Prof. E. E. Barnard, 485 Photomicrography, Booklet on, 273 Photography, Three-Colour, by A. F. von. Hübl, Translated by H. O. Klein, 641 Phototropy of Inorganic Systems, J. R. Mourelo, 721 Physical: Anthropology, 115; Chemical, and Engineering Constants, Dr. J. A. Harker, 475; Constants, Dr. J. A. Harker, 281; Units, the Names of, Dr. C. E. Guillaume, Dr. J. A. Harker, 427; A. Campbell, 451; Dr. Norman R. Campbell, 480 Physics, Applied, Outlines of, H. Stanley, 257; General, a Text-book of, for College Students, Dr. J. A. Culler, 423; Manuals of, 423; Practical, Notes on, for Junior Students, Prof. C. G. Barkla and Dr. G. A. Carse, 423; Practical, Preliminary, A. E. Lyster, part ii., Heat, 257; Text-books of, 257 Physiographic Features as a Factor in the European War, Physiology of "Walking," Dr. T. G. Brown, 26 Piantication, Dr. A. R. Friel, 380 Picea and Abies, New Species and Varieties of, Prof. Pictures in the Land of Temples, Joseph Pennell's, 394 "Pinacoid," the Use of the Term, in Crystallography, Prof. G. A. J. Cole, 318 Pine Martens, a Litter of, in the Lake District, 460 Pittsburgh, a Laboratory of Occupational Diseases at, 692 Pitwood, Supply of, Sir W. Schlich and others, 176 Plant-breeding, Fundamentals of, Dr. J. M. Coulter, 478 Plants and their Ways in South Africa, Prof. B. Stoneman, new edition, 698; collected in Southern Rhodesia, F. Eyles. 582; in the Percy Sladen Memorial Expeditions in South-West Africa, Prof. Pearson, 351; Fossil, from North Devon, Dr. Arber and R. H. Goods, 55; Plateau Peoples of South America, the, A. A. Adams, 284 Platinum, Tetravelent, Compounds of, L. Tschugaeff and N. Wladimiroff, 529 Pleiades, Relative Proper Motions of the, Dr. R. Trümpler, 126 Pleistocene Southern Elephant, Discovery of a Skeleton of the, at Upnor, 544 Pliocene Man, Clement Reid and others, 303 Plumage in some British Ducks, Miss A. C. Jackson, 569 Plymouth, Marine Biology at, 629 Poison War, the, A. A. Roberts, 560 545 Poisoned Bait in Controlling House-flies, C. W. Mally, Gas, Defence against, Dr. F. C. Coley, 349; Gases in Warfare and their Antidotes, Sir W. A. Tilden, 395 Poisonous Pollen, the Physiology of, Y. Tokugawa, 599 Polymorphism, Isomerism, and Polymerism, H. V. 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