456 



NA TURE 



[March io, 1898 



DIARY OF SOCIETIES. 



THURSDAY, March to. 



Royal Society, at 4.30.— (i) On the Rotation of Plane of Polarisation of 

 Electric Waves by a Twisted Structure. (2) On the Production of a 

 ■"Dark Cross" in the Field of Electro-magnetic Radiation: Prof. J. C. 



: Bose. — An Extension of Maxwell's Electro-magnetic Theory of Light to 

 include Dispersion, Metallic Reflection, and Allied Phenomena : E. 

 Edser. — On the Relative Retardation between the Components of a 

 Stream of Light produced by the Passage of the Stream through a Crys- 

 talline Plate, cut in any Direction with respect to the Faces of the 

 Crystal : J. Walker. — On the Relation between the Diurnal Range of 

 Magnetic Declination and horizontal Force, and the Period of Solar Spot 

 Frequency : W. Ellis. 



Royal Institution, at 3. — Recent Researches on Magnetism and Dia- 

 magnetism : Prof. J. A. Fleming, F.R.S. 



Society of Arts (Indian Section), at 4 30.— India and Sir Henry Maine : 

 Charles Lewis Tupper, C.S.I. 



Mathematical Society, at 8. — The Geodesic Geometry of Surfaces in 

 non-Euclidean Space : A. N. Whitehead. — The Transformation of Linear 

 Partial Differential Operators by Extended Linear Continuous Groups : 

 Prof. Elliott, F.R.S. — Stereographic Illustrations of Catenaries : Prof. 

 Oreenhill, F.R.S., and T. I. Dewar.— On Linear Homogeneous Con- 

 tinuous Groups whose operations are Permutable : Prof. W. Burnside, 

 F.R.S.— Supplementary Note on Aurifeuillians : Lieut. -Colonel Cunning- 

 ham, R.E.— On the Calculation of the Sum of the wth Powers of a Large 

 Number of Magnitudes : W. F. Sheppard. 



Institution of Electrical Engineers, at 8.— On the Manufacture of 

 Lamps and other Apparatus for 200 volt Circuits : G. Binswanger- 

 Byng. 



FRIDAY, March 11. 



Royal Institution, at 9. — Marked Unexplored : W. F. Lord. 

 Royal Astronomical Society, at 8. — On a convenient Method of Adjust- 

 ing a Polar Axis to the Diurnal Motion : D. P. Todd. — Nebulae dis- 

 covered at the Royal Observatory, Cape of Good Hope : Royal Observ- 

 atory, Cape of Good Hope. — List No. 7 of new Nebulae : L. Swift.— Long 

 enduring Spots on Jupiter : A. S. Williams.— The Concave Grating for 

 Stellar Photography : C. L. Poor. — On the Fallacy Associated with the 

 Current Rotation Periods of Venus : E. M. Antoniadi. — Equatorial Com- 

 parisons of Neptune with II j Tauri: J. Tebbutt. -A Remarkable Object 

 in Perseus : Rev. T. E. Espin. — On the "Two Method" Personal Eqna- 

 tion : W. W. Bryant. — A few Suggestions with Reference to the New- 

 tonian Reflector : T. W. Bush.— The Spectrum of o Ceti, as Photo- 

 graphed at the Stonyhurst College Observator>' : Rev. W. Sidgreaves.— 

 The Effect of Latitude Variation on the Ecliptic Investigation : W. G. 

 Thackeray.— Note on Dr Gill's Paper on the Effect of Chromatic Dis- 

 persion of the Atmosphere on the Parallaxes of a Centauri and /3 Orionis : 

 Prof. A. A. Rambaut. 



Physical Society, at 4.— Council Meeting. At 5.— On Dynamical 



Illustrations of certain Optical Phenomena: Prof. J. D. Everett, F.R.S. 

 — On Properties of Liquid Mixtures: R. A. Lehfeldt. 

 .Institution of Civil Engineers, at 8.— The Drainage of Cottage 



Property : H. C. Adams. 

 J Malacolggical Society, at 8.— The MoUusca of Lake Tanganyika, with 

 especial reference to their Origin and Affinities : J. E. S. Moore.— On 

 the Anatomy oi Mulleria and Mutela : M. F. Woodward. 

 . MONDA Y, March 14. 

 ■ Society of Arts, at 8.— The Thermo-Chemistry of the Bessemer Process : 

 Prof. W. N. Hartley, F.R.S. 

 Royal Geographical Society, at 8.30.— Exploration in Spitsbergen, 



1897 : Sir W. Martin Conway. 

 Society of Chemical Industry, at 8. — Electrical Industries at the 

 Foyers Waterfalls : R. W. Wallace. 



TUESDAY, March 15. 

 •Royal Institution, at 3.— The Simplest Living Things: Prof. E. Ray 



Lankester, F.R.S. 

 Society of Arts (Foreign and Colonial Section), at 4 30.— The West 



Indies and Sugar Bounties : Nevile Lubbock. 

 Zoological Society, at 8.30.— On New or Imperfectly Known Species 

 of Ostracoda, chiefly from New Zealand : Dr. G. Stewardson Brady, 

 F.R.S.— On a New Flagellate Protozoan of the Genus Lophomonas : «;. 

 H. J. Schuster.— On the Early Post-Larval Stages of the Crab {Cancer 

 jiagiirus), and on the Affinity of that Species with A telecyclus heterodon : 

 J. T. Cunningham. 

 •Institution of Civil Engineers, at 8. — Calcium Carbide and Acetylene : 



Henry Fowler. 

 Royal Photographic Society, at 8.— Half-tone Negative-making : W. 



H. Lascelles. 

 Royal Victoria Hall, at 8.30.— Wireless Telegraphy: A. W. Porter. 

 Royal Statistical Society, at 5. 



IVEDNESDAY. March 16. 

 Society of Arts, at 8. — The Recent History of Paper-making : Clayton 



Beadle. 

 Royal Geographical Society, at 4.30. — Sea Beaches and Sand Banks: 



Va»ghan Cornish. 

 Entomological Society, at 8. — Further Notes on Dyscritina, Westw. : 



E. E. Green. 

 Royal METE0ROLOGiCAL'SociETY,at 7.30. — Photographing Meteorological 



Phenomena : Arthur W. Clayden. 

 Royal Microscopical Society, at 8. — Exhibition of Mounted Rotifers : 

 G. F. Rousselet. 



THURSDA Y, March 17. 

 Royal Society, at 4.30. — The Croomian Lecture will be delivered by 

 Prof. Wilhelm Pfeffer, For. Mem. R.S. On the Nature and Significance 

 of Functional Metabolism (Betriebs-stoflfwechsels) in the Plant. 

 Royal Institution, at 3. — Magnetism and Diamagnetism : Prof. J. A. 



Fleming, F.R.S. 

 LiNNEAN Society, at 8. — Natural Selection the Cause of Mimetic Re- 

 semblance and Common Warning Colours : Prof. E. B. Poulton, F R.S. 

 — On the Brain of the Edentata, including Chlamydophorus : Dr. Elliott 

 Smith. —On Limnocarpus, a New Genus of Fossil Plants from the Tertiary 

 Deposits of Hampshire : Clement Reid, 



Chemical Society, at 8. — The Reduction of Bromic Acid and the Law 

 of Mass Action : Winifred Judson and Dr. J. Wallace Walker. — The 

 Action of Ferric Chloride on the Ethereal Salts of Ketone Acids : — Dr. 

 R. S. Morell and Dr. J. M. Crofts.— Note on the Volatility of Sulphur 

 T. C. Porter. — Action of Ammonia and Substituted Ammonias on Acetyl- 

 urethane : Dr. George Young and Ernest Clark. — Cannabinol : T. B. 

 Wood, W. T. N. Spivey, and Dr T. H. Easterfield.— Formation of 

 Oxytriazoles from Semicarbazides : Dr. G. Young, and B. M. Stockwell. 



Institution of Civil Engineers, at 8. — Sixth "James Forrest" Lec- 

 ture, Geology in Relation to Engineering : Prof. W. Boyd Dawkins, 

 F.R.S. 



Camera Club, at 8.15. — Some Recent Animal Photographs: Gambler 

 Bolton. 



FRIDAY, March i8.- 



Royal Institution, at 9. — The Bringing of Water to Birmingham fro 

 the Welsh Mountains : J. Mansergh. 



BOOKS, PAMPHLET, and SERIALS RECEIVED. 



Books. — Peregrinazioni Antropologische e Fisiche, &c. : Dr. T. Vignoli 

 and Prof. G. V. Schiaparelli (Milano, Hoepli). — Travels in the Coastlands 

 of British East Africa &c.: W. W. A. Fitzgerald (Chapman).— L'Alg6rie : 

 J. A. Battandier and L. Trabut (Paris, Bailliere). — Epidemic Diphtheria : 

 Dr. A. Newsholme (Sonnenschein) — Magnetical and Meteorological Ob- 

 servations made at the Government Observatory, Bombay, 1896 (Bombay). 

 — Geological Literature added to the Geological Society's Library during 

 the Year ended December 31, 1897 (Geological Society). — Royal Geo- 

 graphical Society. Year-Book and Record, 1898 (Royal Geographical 

 Society).— La Photographic et I'Etude des Nuages : J. Boyer (Paris, C. 

 Mendel). — The Teacher's Manual of Object-Le.ssons in Domestic Economy, 

 V. T. Murche : Vol. i (Macmillan). — General Elementary Science (Clive). 



Pamphlet. — Review of Mineral Production in India for 1896 (Calcutta). 



Serials. — Bulletin de I'Acad^mie Royale des Sciences, &c., de Belgique, 

 1898, No. I (Bruxelles) — Journal of the Royal Microscopical Society, 

 February (Williams). — Zeitschrift fiir Physikalische Chemie, xxv. Band, 2 

 Heft (Leipzig, Engelmann). — Middlesex Hospital Journal, Vol. 2, No. 6 

 (London). — Quarterly Journal of the Geological Society. February (Long- 

 mans). — Journal of Botany, March (West).— Scribner's Magazine, March 

 (Low).— Archives de Parasitologie, January (Paris, Carr6).— Revue de 

 rUniversit^ de Bruxelles, March (Bruxelles). — National Review, March 

 (Arnold). — Fortnightly Review, March (Chapman). — National Geographic 

 Magazine, February (Washington). — Transactions of the American Micro- 

 scopical Society, December ( Buflfalo). — Geographical Journal, March (Stan- 

 ford).— Astrophysical Journal, February (Chicago).— Atlantic Monthly, 

 March (Gay). 



CONTENTS. PAGE 



Two Text-Books of Elementary Geometry. By 



G. B. M 433 



Our Book Shelf:— 



Bjorling : ' ' Whittaker's Mechanical Engineer's Pocket- 



Book."— H. B 434 



Wyatt : ' ' Handbooks of Practical Science " .... 435 

 Kerr: "Science Handbooks for Laboratory and 



Class Room " 435 



Mitchell: " Quantitative Practical Chemistry " . . 435 

 Ransome : "Researches on Tuberculosis. The Weber- 



Parkes Prize Essay, 1897."— F. W. T 435 



" The Electrician Electrical Trades' Directory and 



Handbook for 1898" . . 435 



" The Universal Electrical Directory (J. A. Berly's) " 435 

 Rowan : " A Flower Hunter in Queensland and New 



Zealand" 436 



Tappeiner : " Introduction to Chemical Methods of 



CHnical Diagnosis."— F. W. T 436 



Letters to the Editor :— 



Five-fingered Crab. {Illustrated.)— 'R. I. Pocock 436 



Dew and Absorption. — T. Wilson . . . . 436 

 Oat Smut as an Artist's Pigment.— Kumagusu 



Minakata 437 



Geological Photographs. [Illustrated.) By Prof. W. 



W. Watts .437 



Some Rare Birds' Eggs. By R. L 438 



Notes 440 



Our Astronomical Column : — 



Occultation of Antares 442 



Nautical Almanac, 1901 442 



Variable Star U Pegasi 442 



The Photography of Nebulae. {Illustrated.) By 



Prof. R. A. Gregory 443 



Photo-micrography with High Powers. {Illustrated.) 



By J. Edwin Barnard and Thomas A. B. Carver . 448 



A Method of Measuring Wind Pressure 449 



An Enchanted Mesa. {Illustrated.) 450 



University and Educational Intelligence 451 



Societies and Academies 452 



Diary of Societies 456 



Boo'cs, Pamphlet, and Serials Received 456 



NO. 1480, VOL. 57] 



