[A'ature, J tine 3, 1 886 



Permanent Magnetic Polarity, Prof. Oliver Lodge, F. R. S., 

 484 



Perry (Prof. John), Note on Ramsay and Young's Paper on 

 some Thermodynamical Relations, 334 



Perry (Rev. S. J., F.R.S.) and Prof. Balfour Stewart, F.R.S., 

 on Magnetic Fluctuations of the Declination at Kew and 

 Stonyhurst, 262 



Perthshire Society of Natural Science, 160 



Peruvian Unit of Measure Preserved in the French Observatory, 

 on the Authenticity and Exact Value of the, M. C. Wolf, 

 503 



Petchora and Obi Rivers, New Route between, Nosiloff, 186 



Pelermann's Mittheilungen, 64, 211, 425, 567 



Peters (Dr. C. W.), Double Star 6i Cygni, 350 



Petrie (Wm. F.), Recent Star-Shower, 128 



Petrography, a New Work on, 449 



Petroleum- Wells, Reported Discovery of, at Jemsah, 496 



Phanerogams, Evolution of the, MM. Saporta and Marion, J. 

 Starkie Gardner, 388 



Phenological Observations for 1885, Rev. T. A. Preston, 190 



" Philippine Types," Dr. Meyer's Album of, 591 



Phillips (R. E. ) on the Construction of Modern Cycles, 132, 

 177 



Philology, Comparative, Prof. T. de Lacouperie, 40 



" Phonophore," New Telephonic Invention, Langdon Davies, 

 610 



Phosphonium Chloride, Experiments on Phenomena during De- 

 composition of, J. H. van't Hoff, 63 



Photography : Photographing the Corona in Full Sunshine, 42 ; 

 Photography of the Corona, Capt. W. de W. Abney, F.R.S., 

 53 ; French Photographs of the Transit of Venus, 89 ; 

 Jordan's Photographic Sunshine Recorder, 95, iSo; Composite 

 Photography, 182 ; Discovery of New Nebula by Photography, 

 235 ; Photography as a Means of Discovery in Astronomy, 

 Janssen, 287 ; Photographic Evidence as to the Constitution of 

 Sunspots, 328 ; Photography, Stellar, 376 ; Photographic 

 Study of Stellar Spectra, "Henry Draper Memorial," Edward 

 C. Pickering, 535 ; Photography, Celestial, M. Monchez on, 

 383 ; the Pleiades as Seen and as Photographed, MM. Henry, 

 592 



Photometer, 42 ; Prof. Wilsing on the, 42 ; Mr. Chandler on, 

 42 ; the Wedge, Dr. Konig on the, 480 



Photometry of the Pleiades, 161 



Photometry, Colour, Capt. Abney and Gen. Festing, 525, 526 



Phyllotaxis, on some Models Illustrating, Prof. T. Jeffery 

 Parker, 163; Dr. Maxwell T. Masters, F.R.S. , 176 



Phylloxera, P. Boiteau, 336 



Phylloxera at the Cape, 392 



Phylogeny of the Tunicata, on some Points in the, Dr. B. 

 Uljanin, Prof. W. A. Herdman, 546 



Physical Laboratory Practice, First Course of, A. M. Worthing- 

 ton, 580 



Physical Society, 93, 166, 263, 334, 405, 478, 526, 574, 620 



Physics at Johns Hopkins University, 237 



Physics, Molecular, 330 



Physikalische Krystallographie, P. Groth, 316 



Physiology : Physiological Effects of Alpine Climbing, Observa- 

 tions on, M. Vernet, 18; Prof. M. Foster's Article on Physio- 

 logy in the Encyclopaedia Britannica, 121 ; Physiological 

 Laboratory of the University of Pennsylvania, Notes on the, 

 N. A. Randolph, 126 ; Syllabus of a Course of Lectures on 

 Physiology, Dr. P. H. Pye-Smith, 150; Studies from the 

 Laboratory of Physiological Chemistry of the .Shefifield Scien- 

 tific School of Yale College for 18S4-85, 316 



Pickering (Edward C), Photographic Study of the Stellar 

 Spectra, " Henry Draper Memorial," 535 



Pickering (S. U.), Molecular Weights of Salts, 21 ; on Calori- 

 metrical Thermometers, 405 



Pickering (W. H.), Photographing the Corona in Full Sunshine, 

 42 



Picton.al Arts of Japan, W. Anderson, 386 ; F. V. Dickins, 

 .3S6, 418 



Pierres a Cupules, 525 



Pigeons, the Corpora Striata in. Prof. H. Munk, 216 



Pigeons, Fancy, J. G. Lyell, W. B. Tegetmeier, 412 



Pigments, Artist's Manual of, H. C. Standage, 530 



Pilcomayo River, Exploration of, 521 



Pile-Dwellings of Lake of Bienne, Skulls ound in. Dr. Studer, 

 17 



Pinto (Major Serpa), Exploration of Africa, 521 



Pisciculture, 41, 6: ; at South Kensington, 106, 278 ; at Isle 



of Mull, 278 ; in Canada, 302, 303 

 Plagiostomata, the Anatomy of the Central Nervous System ot 



the, Alfred Sanders, 333 

 Planets : the Moon Considered as a Planet, a World, and a 



Satellite, James Nasmyth, 79 ; Telescopic Search for the Trans- 

 Neptunian, David P. Todd, 258 ; Apparent Movements of the 



Planets, W. Peck, 438 ; Discoveiy of Minor Planets, Herr 



Palisa, 567 

 Plantes, une Experience sur I'Ascension de la Seve chez les, 



Leo Errera, 580 

 Plants, Action of Argillaceous Clays in Fixation of Free Atmo- 

 spheric Nitrogen in, Berthelot, 24 

 Plants and Animals, Wanderings of, Victor Hehn, Dr. Alfred 



R. Wallace, 170 

 Plants considered in Relation to their Environment, 607 

 Plants, Sensibility and Movements of, the late Prof. Morren on, 



520 

 Plants, the Transpiration of, the Effects of .Solar .Spectrum on, 



Rev. G. Henslow, 165 

 Playfair (Sir Lyon, F.R..S.), Appointed Vice-President ot the 



Council, 347 

 Pleiades, Photometry of the, l6i 

 Pleiades, the. Miss A. M. Gierke, 561 

 Pleiades as Seen and as Photographed, MM. Henry, 592 

 Pleiades Group, Photographic Map of, 599 

 Pleiades, the — Sonnet, 516 

 Pleomorphism of the Schizophyta, Prof. E. Ray Lankester, 



F.R.S., 413 

 Poland, Forests and Forestry in, J. Croumbie Brown, LL.D., 



27 

 Polarisation in the Dielectrics, on the Influence of Magnetisation 



on, E. van Aubel, 332 

 Polarisation of Light, Sir John Conroy on, 453 ; Herr Sohncke, 



497 

 Polarity, Permanent Magnetic, Prof. Oliver Lodge, F.R.S., 



484 

 Polarity of Quartz, Permanent Magnetic, Dr. Arthur Schuster, 



F.R.S., 391.441 

 Pole (Dr. William, F.R.S.), Aiirial Navigation, 444 

 Polejaeff (N.), Report on the Keratosa, 409 

 Political Economy, Text-Book of, Francis A. Walker, Prof. R. 



Adamson, 457 

 Poppies, Double, and the Consolidation of Emb.ankments, 



209 

 Potanin (G. N.), Journey to the Upper Hoang-ho, 43, 186, 304, 



539 

 Potsdam, Astrophysical Observatory of, 376 

 Poulton (Edward B.), Snails Eating Whitening, 176; Special 



Colour-Relations between Larva of Smtrinthiis octllatus and 



its Food-Plants, 474 

 Poultry for Prizes and Profit, J. Long, W. B. Tegetmeier, 



412 

 Powell (J. W.), on the Growth of Barbarism and Civilisation 



from the Savage State, 537 

 Prehistoric Periods, the Three Great, 590 

 Prehistoric Remains found near Magdeburg, 450 

 Preston (Rev. T. A.), Phenological Observations for 1885, 



190 

 Prestwich (Prof. Joseph, F.R.S.), Geology, 16, 385 

 Primaeval Times, Mammalia in their Relation to, Oscar Schmidt, 



556 

 Prime Meridian Time, 259 



Pringsheim (Dr.), the Action of Light on Gases, 287 

 Prisms, on the Flexion of, H. Resal, 552 

 Pritchard, Note on Sonnet to. Prof. J. J. Sylvester, F.R.S , 



558 

 Prjevalsky's Explorations in Central Asia, 108, 283, 468 

 Problem Papers, Solutions of Weekly, Rev. J. J. Milne, 



391 

 Proceedings of the Linnean Society of New South Wales, 189, 



572 

 Proctor (Richard A.), Rotation of Mars, 81, 245 

 Projectiles, Law of the Resistance of the Air to the Motion of. 



Rev. F. Bashforth, 604 

 Prominences and Magnetic Disturbances, 498 

 Prominences, Solar, Displacement of Lines in, 498 

 Prospector's Hand-book, J. W. Anderson, 317 



