;36 



NA TURE 



[February 2, 1899 



DIARY OF SOCIETIES. 



THURSDA Y. Fei.ruar%' 2. 



RovAL SociETV, at 4.30. — Sets of Operntions in relation to Groups of 

 Finite Order : A. N. Whitehead.— Note on the Enhanced Lines in the 

 Spectrum of oCygni: Sir J. N. Lockyer, F.R.S.— The Constitution of 

 the Electric Spark: Prof. A. Schuster, F.R S., and G. Hemsalech.— On 

 the Effects of Strain on the Thermoelectric Qualities of Metals: Dr. 

 Magnus Maclean. 



KovAL Institution, at 3.— Tibet and the Tibetans : A. H. Savage 

 Lander. 



LiNNEAN Society, at 8.— Notes on the Genus Nanomitrium, Lindberg : 



E. Stanley Salmon. — On the Production of Apospory by Environment 

 in At/fitim Filix-/oemina, var. unco-^loiHefatnin, an apparently Barren 

 Fern : IJr. F. W. Stansfield.— On the Genus Lemnalia, Gray, with an 

 Account of the Branching System of the Order Alcyon.icea : Gilbert C. 



Bourne. 

 CHEMlCAt. Society, at 8. — (i) Maltode.vtrin, its 0.\idation Products and 

 Constitution; (2) On Attempts to prepare Pure Starch Derivatives 

 tbrouKh their Nitrates : Dr. H. T. lirown, F.R. S, and J. H. Millar.— 

 An Isomerideof Amarine : Dr. H. Lloyd Snape and Dr. ArlhurBrooke.— 

 Propylbenzenesulphonic Acids : Dr. G. T. Moody —Derivatives of Di- 

 bcnitylmiiitylene : W. H. Mills and r. H. Easterfield.— On the Action 

 of Chlorosulphonic Acid on the Paraffms and other Hydrocarbons; Dr. 

 Sydney Young, F.R.S — (1) The Action of Reducing Agents on 

 Nitrogen Iodide ; t2)The .Action of .\cids upon Nitrogen Iodide : F. D. 

 Chattaway and H. P.Stevens. — The Composition of Nitrogen Iodide: 



F. D. Chattaway.— (1) The Preparation and Properties of Nitrogen 

 Iodide ; (2) The Action of Light upon Nitrogen Iodide ; (3) The Action 

 of Alkaline Hydrates, of Water, and of Hydrogen Peroxide upon 

 Nitrogen Iodide ; (4) Theory of the Formation and Reactions of 

 Nitrogen Iodide : F. D Chattaway and Kennedy J. P. Orton. 



FRIDA y, Febri'arv 3. 

 R )VAi. Institution, at 9.— The Roman Defences of South-East Britain ; 



Prof. Victor Horsley, F.-R.S. 

 Geologists' Association-, at 7.30.— .Vnnua! Meeting. — .\ddress by the 



President, J. J. H. Teall, F.R.S. 

 Qubkbtt Microscopical Club, at 8. 



MONDA Y. February 6. 

 Society of Arts, at 8.— Bacterial Purification of Sewage : Dr. Samuel 



Rideal. 

 I.MPt^KlAL Institute, at 8.30.— E.\plorations in Fiordland, New Zealand : 



Hon. Thomas Mackenzie. 

 Victoria Institute, at 4.30.— Protection among Animals : Dr. W. Kidd. 



TUESDA Y. February 7. 



Rival Institution, at 3.— Morphology of the Mollusca : Proi. E. Ray 

 Uinkester, F.R S. 



Zoological Society, at 8.30. — On the Cerebral Convolutions of the 

 Gorilla : F. E. Beddard, F.R.S. — Note on the Presence of Supernumerary 

 Bones occupying the place of Prefrontals in the .Skull of ceitain Mam* 

 inals : Dr. R O. Cunningham.— On the Mice of St Kilda : G. E. H. 

 Barrelt-Hamillon.— Notes on Notornh : Prof. W. Bla.\l3nd Benham. 



Ro.stoen Society, at 8 —.A Modified Form of Tocpler .Mercurj' Pump : 

 Wilson Noble.— Discussion on the Rontgen Ray Photography of Soft 

 Tissues, introduc-d by the President. 



Institution op Civil Engineers, ai 8. — Paper to be read and discussed ; 



The Waterworks of the M.adras Presidency : J. A. Jones. And, time 



p!;rmitting : The Lake Superior Iron Ore Mines, and their Influence 

 upon the Production of Pig Iron and Steel ; Jeremiah Head and 



Archibald P. Head. 



Society 



WEDNESDA y, February 8. 

 .\rts, at 8.— Nernst's Electric Light : James Swinburi 



THURSDAY, February 9. 



Royal Society, at t.-jo.—Prol'aM,- Papers : On the Reflection of Cathode 

 Ray, : A. A. C. Swinton.-On the Recovery of Iron from Overstrain : 

 James Muir.— A Soil Bacillus of the Type cl De Bary's B. mtea- 

 titer, urn : Dr. W. C. Sturgis. 



RovAL Institution, at 3. — Toxins and Antitoxins: Dr. .Allan Mac- 

 fadyen. 



M\rrieMATlCAL Society, at 8. — On a certain Mineral Surface and on a 

 Solution of r-V-c: T. J. Bromwich.— The Group of Linear Homo- 

 geneous Substitutions on m>j Variables which is defined by a certain In- 

 v.iriant: Dr. L. E. Dickson —On the Complete System of Differential 

 Covariants of a Single Pfallian Expression, and of a Set of PfafTian Ex- 

 pressions : J. Brill -Group, of Order /3y : E. A Western. 



Institution of Electrical Engineers, at 8.— Rules for the Regulation 

 of the Wiring of Premises for Connection to Public Supply Mains ; J. 

 Pigg.— The Regulation of Wiring Rules : C. H. Wordingham.— The 

 Institution Wiring Rules : R. K.Crompton.— (Continuation of Discussion, 

 if time permits : Electric Tt.iclion by Surface Contacts : Miles Walker. 



FRIDA Y, February 10. 

 KovAL lNSTlTi>riON, al 0.— Motion of a Perfect Fluid: Prof. H. S. 



Hclc-.Shaw. 

 Royal Astronomical Society, at 3 — Annivers.-ir>' Meeting. 

 Physical Society, at 5.— Annual General Meeting.— Atldress by the 



President. — An Ampere-Meter and a Volt. .Meter with a Long Scale; 



Benjamin Davics. (This will probably be read by Dr. Lodge.) 

 Malacological Society, at 8. 

 Institution op Ciyil Engineers, at 8 —The Electrical Driving of 



l-.ngineeiing Workshops : William Middleton. 



SATURDAY, Fkiiruary u. 

 RovAi Institution, at 3.— Mechanical Properties of Bo<lies: l.ord 



NO. 1527, VOL. 59] 



BOOKS, PAMPHLETS, and SERIALS RECEIVED. 



BooKS.-San.itori:i for Consumptives: Dr. F. K. Wallers (Sonnen- 

 schein).—L- Industrie du (Joudron de Houille ; Dr (l. K. Jauberl (Paris, 

 Gauthier.Villars).— The Tokyo Imperial Universily Calendar, 1897-98 

 (Tokyo).— Die Spiele der Menschen : Prof. K. Groos (lena, Fischer).— 

 Photography : A. Brothers, 2nd edition (Griffin).- A TexlBook of Physics : 

 Profs. Poynting and Thomson, Sound (GrilTin).- Dictionary of Medical 

 Terms : H. de Meric (liailliere).- Notes on Cage Birds : edited by Dr. W. 

 T.Greene. 2nd series (Cill).— Wonders of the Bird World- Dr. R. B. 

 Sharpe (G.irdner).— The Valley of Light : W. B. Worsfold (Macmillan).— 

 Inthe Austr.ilian Bush.&c. : R. Semon, translated (Macmillan).— An Illus- 

 trated School Geography : A. J. Herbertson (.Arnold).- Calendario del 

 Santuario di Pompei, iBqo (Valle di Pompei).— Continuous-Current Dy- 

 namos ; J. Fisher-Hinnen (Biggs).— Traitii Elimcntaire de Mdtdorologie : 

 Prof. A. Angol (Paris, Caulhier-VilL-irs). 



Pamhhlets.— The Triassic Formation of Connecticut ; W. M. Davis 

 (Washington).— A Table of the North American Tertiary Horizons ; W. H. 

 Dall (Wa.shington).— The Dolmens of Japan and their Builders; W. 

 Gowtand (Clowes). 



Serials — School A\'orld, January (Macmillan). — .\ Manual of the Geology 

 of India, 2nd edition. Pan r (Calcutta). — Astrophysical Journal, December 

 ^Chicago). — National Geographic Magazine, December (Washington). — 

 Physical Review, December (Macmillan). — Zoologist, January (West). — 

 Agricultural Gazette of New South Wales, November (Sydney). — Journal 

 of the Sanitary Institute, January (Stanford). — Quarterly Review, January 

 (Murray).- Journal of the Chemical Society, Janu.ir^'((iumey).— Archives 

 of the Roentgen Ray, November (Rebman).— Journal of the Franklin 

 Institute, January (Philadelphia). — American Naturalist, January- (Ginn). 

 — Popular Astronomy, January (Wesley). — The Technology Review, 

 January (Boston) —Chambers's Journal, February (Chambers).- Good 

 Words, February (Isbister).— Sunday Magazine, February (Isbister). — 

 American Journal of .Mathematics, January (Baltimore).— Century 

 Magazine, February (Macmillan). 



CONTENTS. PAGE 



The Records of the Rocks. By H. B. 'W 313 



The Mathematical Theory of Electricity and 



Magnetism. Ky L. R. W 314 



Young's General Astronomy. By W. J. S. L. 315 



Our Book Shelf;— 



Hutchinson: " The Cainpaign in the Tirah " . . . 315 

 " Preliminary Report of an Invesiigalion of Riyers 

 and Deep Grmind Waters of Ohio as Sources of 



Water Supplies " . 316 



Marlatt: " The Periodical Cicada."— W. F. K. . 316 

 Wilson: "The Brain Machine: its Power^ and 



Weakness" '. . . 316 



Wilson: " The Swastika" 316 



Lovendal : " Dictlonnaire Technique Fran9ais- An- 

 glais" 316 



" Incubators and Chicken Rearing Appliances " . . 316 

 Letters to the Editor : — 



Prof. Meldula aiul .\Ir. Herliert Spencer as Critics. — 

 The Duke of Argyll, K.G., F.R.S. ; Prof. R. 

 Meldola F R.S. .... 3>7 



The British Mustu,,, Catalogue of Birds —Prof. E. 



Ray Lankester, F.R.S 31S 



•Queries on the Keilticlion of Andrews' Measurements 

 on Carlionic .\cid. — Prof. K. Tsuruta; Prof. 



P. G. Tait 318 



Fourier's Series. — H. F. Baker, F.R.S. 319 



The .Aurora of September 9, 1898.— Chas. W. 



Purnell 320 



The Application of Photography to the Study of 

 the Manomrtric Flame. (lUiislralai.) By Prof. 



Edward L. Nichols 320 



The Study of Tr.pical Diseases . . 323 



Soils for Artificial Cultures. By Prof. R. Waring- 



ton, F.R.S. 324 



Notes ... 324 



Our Astronomical Column : — 



Astrononiic:il CJcciirrences in February 329 



Harvard Ciillege (Jbservatory 329 



Harvard .Asimphysical Conference . 330 



The Plan of the Earth and its Causes. By Dr. J. 



W. Gregory 330 



University and Kducational Intelligence 331 



Scientific Serials 332 



Societies and Ai ..lemies . 332 



Diary of Societir- 336 



Books, Pamphlets, and Serials Received . . 336 



