456 



NA TURE 



[March 12, 1896 



exhibited. Another form, described under the name Conodectes 

 favosHs, may belong to the Diadectidse, but its relationships are 

 at present uncertain. 



GOTTINGEN. 



Royal Society of Sciences. — In the Nachruhten, No. 

 4, 1895 (mathematico-physical section) the following memoirs 

 communicated to the Society are published. 



October 19. — J. Orth : Report on the work done in the 

 Gottingen Pathological Institute in the summer half-year 1895. 



November 16. — W. Schur : Further communications on the 

 results of pendulum-observations in or near Gottingen. 



November 30. — Georg Landsberg : Foundations of the arith- 

 metical theory of the algebraic functions of one variable. — Eduard 

 Riecke : The quantities ot electricity concerned in a lightning- 

 flash (43 to 98 coulombs). 



DIARY OF SOCIETIES. 



London. 



THURSDAY, March 12. 



Royal Society, at 4.30. — The Croonian Lecture : Observations upon 

 Isolated Nerve : Electrical Changes a Measure of Physico-chemical 

 Change : Dr. A. D. Waller, F.R.S. 



Mathematical Society, at 8. — On the Enumeration of Groups of Toti- 

 tives: Prof. Lloyd Tanner. — (i) The Catenary on the Paraboloid and 

 Cone ; (2> The Motion of the Top : Prof. Greenhill, F.R.S. 



Institution of Electrical Engineers, at 8. — High-Voltage Lamps and 

 their Influence on Central Station Practice : G. L. Addenbrooke. 



Society of Antiquaries, at 8.30. 



Camera Club, at 8.15. — Lord Armstrong's Experiments in Electric Dis- 

 charge : Dr. Bowles. 



FRIDA K, March 13. 



Royal Astronomical Society, at 8. — Observations of the Variable Star 

 R Carinae, December 1890 to August 1895 : J. Tebbutt. — Discovery and 

 Observations of Comet Brooks {d 1895) ; W. R. Brooks. — Observations 

 of the Variable Stars W. X, and Y Sagittarii : Lieut. -Colonel Markwick. 

 —Elliptical Orbit Elements of Comet 1894 i (Gale) : Rev. T. Roseby.— 

 Results of Double Star Measures at Windsor, New South Wales, in 1895 : 

 J. Tebbutt. — On the Determination of the Errors of the Cape Roseau : 

 David Gill and Harold Jacoby. — Royal Observatory, Edinburgh: Ob- 

 servations of Comets. — Note on Mr. Stone's Paper, " Expressions for the 

 Elliptic Co-ordinates of a Moving Point to the Seventh Order of Small 

 Quantities : Prof. E. W. Brown. — Fireball of 1895, November 22 : W. F. 

 Denning. — On the Systematic Errors of Measures of Photographic 

 Plates : Prof. H. H. Turner. — Note on the Zodiacal Light as seen at Ox- 

 ford, 1896, March 4 : Prof. H. H. Turner.— Variation of T Centauri : A. 

 W. Roberts.— Royal Observatory, Greenwich : Results of Micrometer 

 Measures of Double Stars made with the 28-inch Refractor in the Years 

 1894 and 1895. 



Physical Society, at 5. — An Addition to the Wheatstone Bridge for the 

 Determination of Low Resistances : J. H. Reeves. — A Communication 

 on Kathode Rays : Herr Puluj. 



Malacological Society, at 8. 



Institution of Civil Engineers, at 8. — Tests of Centrifugal Pumps : J. 

 C. Cornock. 



.S"^ TURD A K, March 14. 



Royal Institution, at 3. — Light : Lord Rayleigh, F.R.S. 



Royal Botanic Society, at 3.45. 



Essex Field Club (at Loughton). — Demonstration Meeting. — Mosses and 

 Scale Mosses (Muscineae) : G. M. Holmes and E. D. Marquand. 



MONDAY, March 16. 

 -Royal Geographical Society, at 4.30. — On the Maps used by Herodotus : 



John L. Myres. 

 Victoria Institute, at 4.30. — Relations of Mind and Body. 

 'Camer.\ Club, at 8. 15. — The Faroe Islands : K. Grossman. 



TUESDA Y, March 17. 

 JlOYAL Institution, at 3. — The External Covering of Plants and Animals : 



Prof. C. Stewart. 



.Zoological Society, at 8.30.— -A Contribution to our Knowledge of the 



Hymenopterous Fauna of Ceylon : Lieut. -Colonel C. T. Bingham.— ;-On 



British Hydroids and Medusse : Edward T. Browne. — On some Extinct 



Fishes of the Teleostean F.-imily Gonorhynchida; : A. Smith Woodward. 



Institution of Civil Engineers, at 8. — The Lixiviation of Silver Ores : 



J. H. Clemes. — Mining and Tre.itment of Copper Ore at Tharsis, Spain : 



C. F. Courtney. — Tin Smelting at Pulo Brani, Singapore : John McKillop 



and T. Flower Ellis. 



Royal Statistical Society, at 5. — Reformatory and Industrial Schools : 



John Watson. 

 Royal Photographic Society, at 8.— Screens for Process Work ; and a 



Note on Photogravure : Captain Collardon. 

 Koyal Victoria Hall, at 8.30.— Gold Mining : Dr. T. K. Rose. 



WEDNESDAY, March i8. 

 Society of Arts, at 8. — Bahamas Sisal Industry : Dr. D. Morris, C.M.G. 

 Royal Meteorological Society, at 7.30. — Weather Forecasts and 



Storm Warnings : F. Gaster. 

 Royal Microscopical Society, at 8. — American Rotifera : Dr. A. C. 



Stokes. 

 Entomological Society, at 8. — Classification of Three Sub-families of 



Moths of the Family Pyralidje : the Epipaschiinae, Endotrichinse, and 



Pyralina; : George Francis Hampson. — Descriptions of New Oriental 



Scolytidae : Walter F. H. Blandford. 



NO. 1376, VOL. 53] 



THURSDA Y, March 19. 



Royal Society, at 4.30. 



Society of Arts (Imperial Institute), at 8 30.— The Great Landslip at 

 Gohna, in Gurhwal, and the Measures adopted to prevent Serious Ijjss of 

 Life : J. H. Glass, CLE. 



Limnean Society, at 8. — On the Scructure of the Female Flowers and 

 Fruit of Sararanga, Hemsl (P.-indanacea:) : Dr. A. Stapf.— On Two Little- 

 known Opisthoglyphous Snakes : G. S. West. 



Chemical Society, at 8 —The Constitution of a New Organic Acid: H. 

 J. H. Fenton.— The Volume and Optical Relationships of the Monoclinic 

 Series of Double Sulphates R.jM(S04)a.6H.jO : A. E. Tutton. 



Society OF Antiquaries, at 8.30. 



Camera Club, at 8.15. — Views in Cashmere : G. Millais. 



FRIDAY, March 20. 

 Royal Institution, at 9.— Immunisation against Serpents' Venom and 



the Treatment of Snake-Bite with Antivenene : Prof. T. R. Fra.ser, 



F.R.S. 

 Epidemiological Society, at 8. — On Puerperal Mortality : a Statistical 



and Etiological Inquiry : Dr. Williams.— An Outbreak of Typhoid Fever 



in Beyrout, Syria : Dr. Wortabet. 

 Quekett Microscopical Club, at 8. 



SATURDAY, March 21. 

 Royal Institution, at 3.— Light : Lord Rayleigh, F.R.S. 



BOOKS, PAMPHLETS, and SERIALS RECEIVED. 



Books. — By Me.ndow and Stream : The Amateur Angler (S. Low). — In- 

 tensity Coils, 17th edition (Perken)— Alternating and Interrupted Electric 

 Currents : Prof. G. Forbes (Biggs).— Physical Units : Dr. M. Maclean 

 (Biggs).— Hypnotism, Mesmerism, and the New Witchcraft : E. Hart, 

 new edition (Smith).— Les Fermentations : P. Schutzenberger, sixi6me 

 Edition (Paris, Alcan).— The New Photography : A. B. Chatwood 

 (Downey).— The Story of the Nations: The West Indies and the Spanish 

 Main : J. Rodway (TJnwin).- Le9ons sur la Cellule, Morphologic et Repro- 

 duction : L. F. Henneguy (Paris. Carr6).— Mechanics for Beginners : W. 

 Gallatly (Macmillan).— The Number Concept: Dr. L. L. Conant (Mac- 

 millan). — An Elementary Treatise on Rigid Dynamics : W. J. Loudon 

 (Macmillan).— Electric Wiring: R. Robb (Macmillan).— Griffin's Electrical 

 Engineer's Price-Book, new edition, Edited by H. J. Dowsing (Griffin). 



Pamphlets —Zur Mechanik des Vogelfluges : Dr. Fr. Ahlborn (Ham- 

 burg).— Preliminary Report on the Tsetse Fly Disease, or Nagana, in Zulu- 

 land : Surgeon-Major D. Bruce (Durban).— How to Assist the Sight (J. H. 

 Steward). 



Serials.— Bulletin of the American Mathematical Society, February 

 (New York, Macmillan).— Geographical Journal, March (Stanford) — 

 Journ.al of the Royal Microscopical Society, Febru.-iry (Williams).— Psycho- 

 logical Review, Monograph Supplement. No. 2. Association : M. W. 

 Calkins (Macmillan).— Science Progress, March (Scientific Press) —Revue 

 de rUniversit^ de Bruxelles, Nos. i and 2 (Bruxelles).— Proceedings ot 

 the Physical Society, March (Taylor).— Engineering Magazine, March 

 (Tucker). 



CONTENTS. PAGE 



A Glacial Handbook. By Prof. Grenville A. J. Cole 433 



Philosophy and Evolution. By A. R. 'W 435 



Our Book Shelf:— 



MacUougal : " Experimental Plant Physiology " . . 436 

 Austin and Thwing : " Exercises in Physical Measure- 

 ment" .... 436 



Letters to the Editor : — 



The Age of the Wealden.— Prof. O. C. Marsh . . 436 

 The Rontgen Rays.— -Ralph R. Lawrence ; Prof. 

 Silvanus P. Thompson, F.R.S.; J.D. Cormack 



and Herbert Ingle ; G. H. P 436 



The Aurora at Walerford.— Dr. M. F. O'Reilly . . 437 



An Unusual Meteor.~J. Edmund Clark 437 



Recent 'Work of the Geological Survey of the 



United States. I. . 437 



Ostwald's Energetics. By Prof. Geo. Fras. Fitz- 

 gerald, F.R.S 441 



The Highlands of Peru. {Illustrated.) 442 



Sekiya Seikei. ByJ. M 443 



Notes 443 



Our Astronomical Column: — 



Perrine's Comet (1895) 447 



Comet Perrine-Lamp 448 



Orbit of S Cephei 448 



The Absolute Velocity of 61 Cygni 448 



On the Appearance of the Spectral Lines of Clevite 



Gas in Stellar Spectra 448 



The Rontgen Rays 449 



On the Generation of Longitudinal 'Waves in 



Ether. [With Diagram.) By Lord Kelvin, F.R.S. 450 



University and Educational Intelligence 451 



Scientific Serials 452 



Societies and Academies 453 



Diary of Societies 45^ 



Books, Pamphlets, and Serials Received 456 



