26z 



NA TURE 



[January i i, 1906 



sporidium, Pleistophora macrospora: Casimir Cepede. — 

 On the intimate structure of the protoplasm in the 

 Protozoa : Emmanuel Faure-Fremiet. — A respiratory 

 apparatus for the exploration of places filled with 

 irrespirable gases : M. Guglielminetti. The apparatus 

 consists of three parts, the bottle of compressed oxygen, 

 the regenerator and cooler, and the respiratory mask. 

 Illustrations are given showing a diagrammatic arrange- 

 ment of the whole apparatus, and its position in actual 

 use. Its weight is 13 kilograms. — Observations made on 

 Mt. Blanc on the effect of altitude on the blood : H. 

 Cuillcmard and R. Moor. 



DIARY OF SOCIETIES. 



THURSDAY, January ij. 

 Institution of Electrical Engineers, at 8. — The Charing Cross 



Company's Cily of London Works : W. H. Patchell {Conclusion of 



Dist ussiori). 

 Londo Mathematical Society, at 5.30.— On the Diffraction of Sound 



by Large -Cylinders :_ J. W. Nicholson.— On the Monogeneity of 



Algebr: 



Fun 



J. Brill. 



: Dr. H. F. Baker. —On the Expression of the so-called 

 nd Triquaternions with the aid of Quaternary Matrices : 



FRIDAY. January ,2. 



Royal Astronomical Society, at 5.— The Annular Nebula in Lyra: 

 E. E. Barnard.— (1) Star Reductions: (2) ihe Work of a Colonial 

 Observatory: W. E. Cooke.— (:) Elements and Light Curve of RV 

 Lyra; ; (2) Elements and Light Curve of VW Cygni : A. Stanley 

 Williams —The Value of the Constant of Refraction : L. de Ball.— 

 Observations of Comet l< 1905 from Photographs taken with the ^o-inch 

 Reflector of the Thompson Equatorial : Royal Observatory, Greenwich. — 

 On a New Melhod ot Determining the Absolute Dimensions of an Algol 

 Variable : A. W. Roberts. — Report on Observations of Jupiter, 1904-5, 

 made at Trincomali, Ceylon : Major P. B. Molesworth.— Mean Areas 

 and Heliographic Latitudes of sun-spots in the year 1904, deduced from 

 Photographs taken at Greenwich, at Dehra Dtin, at Kodaikanal 

 Observatory (India), and in Mauritius : Royal Observatory, Greenwich. 



Institution of Civil Engineers, at 8. — Lecture on the Theory of 

 Machines: Prof. J. D. Cormack. 



Malacological Society, at 8. — Note of the Dates of Publication of 

 C. L. F. von Sandbergers " Die Land- und Siisswasser-conchylien der 

 Vorwelt," 1870-75 : B. B. Woodward.— New Species of Siphonaria, 

 Terebra, and Maugilia, and a Remarkable Form of Cypraea omenta, from 

 South Africa : G. B. Sowerby.— Remarks on some Forms of Chloritis 

 with Description of a New Species: G. K. Gude.— Notes on the 

 Anatomy of S. African Aplysiid.-e with Descriptions of two New Species : 

 R. H. Burne. — Notes on Yolnta kciiroinann, I'. fapillesa. var. costata, 

 V. roadknighti, Juv., Cy/>raea tigris, var. lineata, and Co 



ar. maitritiana : Mrs. Kenyon. — Description of a New Species 

 of Crepidula from Victoria : Mrs. Kenyon. 



MONDAY, January 15. 

 Royal Geographical Society, at 8.30.— British East African Plateau 



Land and its Economic Conditions : Major A. St. Hill Gibbons. 

 Victoria Institute, at 4.30. — Evolutionary Law in the Creation Story of 



Genesis : Rev. A. I: ' 



'ing 

 TUESDAY, Janua 



el in China and the Far 



Royal Institution, at 5. — Impressions 

 East : Prof. E. H. Parker. 



Institution of Civil Engineers, at 8.— Continued Dii 



Elimination of Storm-water from Sewerage Systems : D. E, Lloyd- 

 Davies — On the Elimination of Suspended Solids and Colloidal Matters 

 from Sewage : Lieut.-Colonel A. S. Jones and Dr. W. O. Travis. 



Zoological Society, at 8.30.— On Bones of the Lynx from Cales Dale, 

 Derbyshire: W. Storrs Fox. — On Mammals from South Johore and 

 Singapore collected by Mr. C. B. Kloss : J. Lewis Bonhote.— Contribu- 

 tions to the Anatomy of the Ophidia : F. E. Beddard, F.R.S.— On the 

 Minute Structure of the Teeth of Creodonts, with Especial Reference to 

 their suggested Resemblance to Marsupials : Charles S. Tomes, F. R.S. 



WEDNESDAY, January 17. 

 Society OF Arts, at 8. — The Scientific Aspects of Voire Development: 



Dr. W. A. Aikin. 

 Entomological Society, at 8. — Anr.ual Meeting. 

 Royal Microscopical Society, at 8. — President's Annual Address: 



The Life and Work of Bernard Renault. 

 Royal Meteorological Society, at 7.45. — Meteorology in Daily Life : 

 Richard Bentley. 



THURSDAY, January 18. 



Royal Society, at 4.30.— Probable Papers: The Faci 



vhich Deter- 

 Dn and Prof, 

 alous Condi- 



; the Production of Intraocul; 

 E. H. Starling, F.R.S.-A Critical Accc 



tions of the Cerebrum in the Human Foetus : Dr. W. L. H. Duckv 

 A Case of Regeneration in Pulychajte Worms: Arnold I. Watson.— On 

 the Infection, Histology, and Development of the Uredo Stage in 

 certain Uredinea:: I. B. P. Evans.— On the Synapsis in Amphibia: 

 J. E. S. Moore and Miss Embleton.— On the Constancy of Form among 

 the Synaptic Gemini (Heterotype Chromosomes) in certain Animals: 

 J. E. S. Moore and G. Arnold.— The Growth of the Oocyte in Antedon : 

 a Morphological Study in the Cell Metabolism : Gilbert C. Chubb. 

 Chemical Society, at S. 30. —The Refractive Indices of Crystallising 

 Solutions with Especial Reference to the Passage Irom the Meta-stable 

 to ihe Labile Condition : H. A. Miers and F. Isaac.— The Determination 



of Available Plant Food in Soils by the Use of Weak Acid Solvents. 

 Part II.: A. D. Hall and A. Amos.— The Action of Ammonia and 

 Amines on Diazobenzene Picrate : O. Silberrad and G. Rotter.— The 

 Preparation of /-Bislriazobenzene : O. Silberrad and B. J. Smart. — 

 Gradual Decomposition of Ethyl Diazoacetate : O. Silberrad and C. S. 

 Roy.— Studies on Nitrogen Iodide. Part III. The Action of Methyl 

 and B-nzyl Iodides: O. Silberradrand B. J. Smart.— Silicon Researches. 

 Part X. Silicon Thiocyanate : J. E. Reynolds.— The Relations between 

 Absorption Spectra and Chemical Constitution. Parti. The Chemical 

 Reactivity of the Carbonyl Group : A. W. Stewart and E. C. C. Baly.— 

 Halogen Derivatives of Substituted Oxamides : F. D. Chattaway and 

 W. H. Lewis.— The Effect of Constitution on the Rotatory Power of 

 Optically Active Nitrogen Compounds. Part L: Miss M. B.Thomas 

 and H. O. Jones.— Menlhyl Benzene Sulphonate and Menthyl-0- 

 Naphthalene Sulphonate: T. S. Patterson and J. Frew.— An Apparatus 

 for the Continuous Extraction of Liquids with Ether : R. S. Bowman. — 

 Action ol Bromine or. Benzeneazo-o-Nitrophenol : f. T. Hewitt and 

 N. Walker.— Some Reactions and New Compounds of Fluorine. Part I. : 

 E. B. R. Prideaux.— The Relation between Absorption Spectra and 

 Chemical Reactivity. Part II. The Quinonesand ci-Diketones : E. C. C, 

 Baly and A. W. Stewart.— The Relation between Absorption Spectra and 

 Chemical Reactivity. Part III. The Nitroanilines and the Nitrophenols : 

 E. C. C. Baly, W. H. Edwards, and A. W. Stewart.— Contributions to 

 the Chemistry of the Rare Earths. Part I. : M. Esposito. — A Synthesis 

 of Aldehydes by Grignard's Reaction; G. W. Monier Williams.— The 

 Condensation of Dimethyldihydroresorcin and of Chloroketodimethyl- 

 tetrahydrjbenzene with Primary Amines. Part 1. Monamines, Ammonia. 

 Aniline, and/-Toluidine : P. Haas. 

 Society op Arts, at 4.30.— The City of Calcutta: C. E. Buckland.— At 

 8.0.— High Speed Electric Machinery, with Special Reference to Steam- 

 Turbine Machines: Prof. S P. Ihompson, F.R.S. 

 Society, at 8.— The Life-history of Ma> 



A. W. A'len. On some Endophytic Algre 



Organ of Sphenodon : Dr. R. Broom. 



FRIDAY, Janua 

 Royal Institution, at 9. — Some Applicant 



Discharge to Spectroscopy : Prof J. J. The 

 Institution of Mechanical Engineers, 



of Construction under Pure Shear : E. G. 



Worm Contact : R. A. Bruce. 



A. D. Cotton. — Jacobson's 



>ns of the Theory of Electric 

 mson, F.R.S. 



at 8.— Behaviour of Materials 

 Izod {Resumed Discussion) : 



CONTENTS. page 



The Equations of the Wave Theory 241 



Liquid Crystals. By H. B. H 242 



Plant-Breeding in America 242 



Chemical Technology. By J. L 243 



Our Book Shelf :— 



Unwin : " Future Forest Trees " 244 



Bailey: " Elements of Quantitative Analysis" — C.J. 244 



Baker : " Elementary Dynamics " 245 



Lucas : " A Historical Geography of the British 



Colonies" 245 



Biermann : Vorlesungen fiber mathematische Niiher- 



ungsmethoden " 245 



Letters to the Editor: — 



Insectivorous Water-plant from Trinidad. — Sir W. T. 



Thiselton-Dyer, K.C.M.G., F.R.S 246 



The Maximum Number of Double Points en a Surface. 



— A. B. Basset, F.R.S 241. 



Sounding Stones. —Cecil Carus- Wilson 246 



Heat a Mode of Motion. — Charles E. Benham . . 246 



The Naming of Colours. — Alfred H. Crook .... 246 



Aurora of November 15. — Prof. M. P. Rudzki . . 246 



Ascent of Sap in Trees. — Frank Harris 246 



Elementary Geology. {Illustrated.) By Prof. Gren- 



ville A. J. Cole 247 



Tidal Researches. By S. S. H 248 



Agricultural Education and Colonial Development . 250 



Magnetic Work in India 250 



Notes 251 



Our Astronomical Column : — 



Comet 19051 (Giacobini) 255 



Ephtmeris for Holmes's Comet (1S92 III., 1S99 II.) . 255 



Photographs of the Solar Granulations 255 



The Orbit of £ Ursa- Majoris 255 



The International Fishery Investigations. By J. 



Johnstone 255 



Insect Pests of the Cotton Plant. (Illustrated.) By 



Fred. V. Theobald 257 



The Great Gnomon of Florence Cathedral. (Illus- 

 trated.) By W. E. R 25S 



The Training of the Body and Mind. By Wilfred 



Mark Webb 259 



Colour Vision in the Peripheral Retina 260 



University and Educational Intelligence 260 



Societies and Academies 261 



Diary of Societies 264 



NO. 1889, VOL 73] 



