XXXll 



Index 



[ 



Nature, 

 March 23, 191 1 



Okapi, a Monosfraph of the, Sir E. Ray Lankester, K.C.B., 

 F.R.S., and Dr. W. G. Ridewood, Sir H. H. Johnston, 

 G.C.M.G., K.C.B., 209 



Okapi, Sir Ray Lankester's Book on the, Sir E. Ray 

 Lankester, K.C.B., F.R.S., 305; Sir H. H. Johnston, 

 G.C.M.G., K.C.B., 306 



Oliver (Prof. F. W.), the Pollen Chambers of Various Fossil 

 Seeds, 5q 



Olsson-SefTer (Miss H.), Character of the Tuantepec 

 Isthmus, its People and Resources, 549 



Oort (Dr. E. D. van), Anttrophasis Monorthonyx, 416 



Ophthalmology : Experimental and Chemical Ocular Action 

 of Bitumen Dust and Vapour, H. True and C. Fleig, 65 ; 

 the Prescribing of Spectacles, A. S. Percival, 467 



Optics : Education in Technical Optics, 56 ; a Micrometric 

 Difficulty, E. M. Nelson, 95; Ahrens' Biliquid Prism, 

 C. D. Ahrens, 124; Optical Dispersion, Dr. T. H. Have- 

 lock, 192 ; Colour-blindness and the Trichromatic Theory 

 of Colour-vision, Sir W. de W. Abney, 259 ; on the Sensi- 

 bility of the Eye to Variations of Wave-length in the 

 Yellow Region of the Spectrum, Lord Rayleigh, O.M., 

 F.R.S., at Royal Society, 421 ; Delicacy Interference 

 Measurements and the Means of Increasing Them, A. 

 Cotton, 429 ; Magnetic Modifications of the Absorption 

 and Phosphorescence Bands of Rubies and on a Funda- 

 mental Question of Magneto-optics, Jean Becquerel, 463 ; 

 New Convertible Balopticon Lantern, 485 ; the Principles 

 and Methods of Geometrical Optics, especially as Applied 

 to the Theory of Optical Instruments, Prof. J. P. C. 

 Southall, 499 ; Licht und Farbe, Robert Geigel, 539 



Orbits of Several Spectroscopic Binaries, the, R. H. Baker, 

 384; F. C. Jordan, 385 



Orchids, James O'Brien, 470 



Organic Analysis, Allen's Commercial, 37 



Oriental or Bubonic Plague, Prof. R. T. Hewlett, 237 



Origin of Dun Horses, Prof. J. C. Ewart, F.R.S., 40; 

 Prof. James Wilson, 106 



Origin of Incense, Sir W. T. Thiselton-Dyer, K.C.M.G., 

 F.R.S., 507 



Origin of Man, the, Charles E. Benham, 336 ; Dr. Cecil 

 H. Desch, 406 



Orion Nebula, Variable Stars in the, 87 



Orlich (Dr. E.), Suggestion to Balance Residual Induct- 

 ance and Capacity, 282 



Ormerod (H. A.), Group of Prehistoric Sites Excavated in 

 South-west Asia Minor, 23 



Ornithology : a Monograph of the Petrels (Order Tur- 

 binares), F. Du Cane Godman, F.R.S., 38; Ornithological 

 Notes from a South London Suburb, 1874-1909, a Sum- 

 mary of Thirty-five Years' Observations, with Some Facts 

 and Fancies concerning Migration, F. D. Power, Sir T. 

 Digby Pigott, C.B., 44; the Tooth-billed Bower-bird 

 {Scenopceetes dentirostris), S. W. Jackson, 84 ; Life of 

 William MacGillivray, M.A., LL.D., F.R.S.E., Ornith- 

 ologist, Professor of Natural History, Marischal College 

 and University, Aberdeen, William MacGillivray, 107 ; the 

 Flight of Birds against the Wind, Dr. W. Ainslie Hollis, 

 107 ; the Flight of Birds, Lucien Fournier, A. Mallock, 

 F.R.S., 445 ; the Sailing-flight of Birds, Canon R. Abbay, 

 475; F. W. Headlev, 511: A. Mallock, F.R.S., 511; 

 Edward D. Hearn, 511 ; Die Vogelwarte Rossitten der 

 Deutschen Ornithologischen Gesellschaft und das Kenn- 

 zeichnen der \'ogel, Dr. J. Thienemann, 207 ; Aigrettes 

 and Bird Skins : the Truth about their Collection and 

 Export, Harold Hamel Smith, 207 ; Death of Capt. G. E. 

 Shelley, 215; Birds of Lord Howe and Norfolk Islands, 

 T. Ir'edale,' 228 ; Birds of Lord Howe and Norfolk 

 Islands, with the Description of a New Species of Petrel, 

 A. F. Basset Hull, 228 ; the Late Mr. Boyd Alexander's 

 Collection of Birds presented to the British Museum, 316; 

 Nature of the Colouring of the Kingfisher, F. J. Stubbs, 

 316; the Book of Migratory Birds, met with on Holy 

 Island and the Northumbrian Coast, to which is added 

 Descriptive Accounts of Wild Fowling on the Mud Flats, 

 with Notes on the General Natural History of this 

 District, W. Halliday, 329 ; the Birds of Dumfriesshire — 

 a Contribution to the Fauna of the Solway Area, Hugh 

 S. Gladstone, 378 ; the Irish Jay, Messrs. Witherby and 

 Hartert, 381 ; Protection of Useful Birds in Hungary and 

 Great Britain, W. H. Shrubsole, 381 ; the British Bird- 

 book, 407 ; Anurophasis monorthonyx, Dr. E. D. \'an 



Oort, 416 ; Unleitung zur Beobachtung der Vogelwelt, 

 Dr. Carl Zimmer, 502 ; the Home-life of the Spoonbill! 

 the Stork, and Some Herons, B. Beetham, 544 ; Austra- 

 lian Birds, J. A. Leach, 557; Eggs of Certain South 

 African Birds, Messrs. Bucknill and (ironvold, 557 ; Irish 

 Coaltit, W. R. Ogilvie-Grant, 557 ; White-breasted British 

 Cormorants, 557 ; Significance of White Markings in 

 Passerine Birds, H. C. Tracy, 557 



Osborn (Prof. H. F.), a " Mummy " of the Iguanodont 

 Dinosaur from the Kansas Cretaceous, 520 



Osier (Prof. W.), Man's Redemption of Man, 404 



Ostwald (W.), Die Wissenschaftlichen Grundlagen der 

 analytischen Chemie, 201 ; International Language and 

 Science, 269 ; Die Forderung des Tages, 298 



Oswald (Dr. F.), the Sudden Origin of New Types, 520 



Outes (Mr.), the Tierras cocidas of the Pampas Beds of 



' Argentina, 178 



Overbeck (O.), Obscure Phenomenon of Alcoholic Fermen- 

 tation, 380 



Oxford, Herbert Spencer Lecture at. Evolution, Darwinian 

 and Spencerian, Prof. Meldoia, F.R.S., 220 



Oysters, Storage of, in Filtered Water, M. Fabre-Domergue, 

 34 



Pack-Beresford (D. R.), the Woodlice of Ireland, their 



Distribution and Classification, K-ii 

 Paddock (Mr.), New Spectroscopic Binaries, 523 

 Paget (Stephen), Research Defence Society, 6 

 Painting : the Materials of the Painter's Craft, in Europe 

 and Egypt from Earliest Times to the end of the Seven- 

 teenth Century, with Some Account of their Preparation 

 and Use, Dr. A. P. Laurie, 533 

 Palaeobotany : Lower Cretaceous Angiosperms, Dr. M. C. 

 Stopes, 139 ; Jurassic Plants from the Marske Quarry, 

 Rev. G. L. Lane, 159 ; a Seed-bearing Irish Pteridosperm, 

 Prof. T. Johnson, 161 ; Arctic Plants from the Valley 

 Gravels of the River Lea, S. Hazzledine Warren, 206; 

 Comparison of Jurassic Floras, Prof. A. C. Seward, 

 F.R.S., 258; the Leaves of Calamites, H. Hamshaw 

 Thomas, 496 ; the Jurassic Flora of Sutherland, Prof. 

 A. C. Seward, 497 

 Palaeolithic Shaft-straighteners, Prof. W. J. Sollas, F.R.S., 



371 

 Palaeontology: Fossilised Birds' Feathers from the Tertiary 

 Ironstone of Redruth, Victoria, F. Chapman, 20 ; Die 

 klimatischen Verhaltnisse der geologischen Vorzeit vom 

 Praecambrium an bis zur Jetztzeit und ihr Einfluss auf 

 die Entwickelung der Haupttypen des Tier- und Pflanzen- 

 reiches. Dr. Emil Carthaus, Ivor Thomas, 36 ; Systematic 

 Position and Feeding-habits of the African Jurassic Genus 

 Tritylodon, and its Northern Allies Plagiaulax and 

 Ptilodus, Dr. R. Broom, 48; Geological Age of the Pithe- 

 canthropus of the Pluvial Period in Java, Julius Schuster, 

 65 ; the Armour of Stegosaurus, F. A. Lucas, 73 ; R. L., 

 73 ; the Foraminifera of the Shore-sands of .Selsey Bill, 

 Sussex, E. Heron-Allen and A. Earland, 86 ; Die Rekon- 

 struktion des Diplodocus, O. Abel, no; Descriptions of 

 the Tertiary Polyzoa of Victoria, C. M. Maplestone, 160; 

 Trilobite Fauna of Upper Cambrian Age (Olenus Series) 

 in North-cast Gippsland, Victoria; F. Chapman, 160 ; 

 Birthplace of Man in the Light of Palaeontological Record, 

 Prof. S. W. Williston, 247 ; a Descriptive Catalogue of the 

 Marine Reptiles of the Oxford Clay, based on the Leeds 

 Collection in the British Museum (Natural History), 

 London, Dr. C. W. Andrews, F.R.S., 264; a Guide to 

 the Fossil Reptiles, Amphibians, and Fishes in the Depart- 

 ment of Geology and Palaeontology in the British Museum 

 (Natural History), 264 ; Bones from the Alabama Eocene, 

 the Pelvis of a Zeuglodon, Dr. Lucas, 278 ; Fucoids, Otto 

 M. Reis, 284 ; Anthracosiidae of the Upper Carboniferous 

 Beds of Miihrisch-Ostrau, Dr. A. Schmidt, 284 ; New 

 Genus and Species of Dibranchiate Cephalopod, Belemno- 

 camax boweri, from the Lower Chalk (Tottenhoe Stone) 

 of Lincoinshi'-e. G. C. Crick. 285 : Fossil Fishes, Bashford 

 Dean, 285 ; Distribution of the Deinosauria in Time and 

 through Geographical Areas, R. S. Lull, 285 ; Miocene 

 Mammalia of Loeben, A. Zdarsky, 285 ; Investigation of a 

 Pre-glacial or Interglacial Bone-deposit near Kronstadt, 

 Franz Toula, 28,; ; Expedition to Java in Search of the 

 Predecessors of the Human Race, Dr. Elbert, 285 ; Stone 

 Implements found near Mar del Plata, Dr. Florentine 



