440 



NATURE 



[May 25, 19H 



Ijli- ■ ■ ' ' When, however, a 



bi. coccus obtained from 



a u......... .: ...■.,.. .., •,..,..'■ i, the: alternate reduc- 

 tion and oxidation tan be rcpriKJuced almost indefinitely. 

 —Augusfin Wrobl«w«ki : Tiw- soluble ferments of the 

 brain. 'I'he presence of c.italase, peroxidase, and lipase 

 was proved.-— Gabriel Bortrand and M. Javillisr : The 

 influence of zinc and m;m^;;in.s,- on the mineral composi- 

 tion of Aspcrfiillus m'iVr.— Jul>s StoklaMi : The physio- 

 logical importance of manganese and aluminium in the 

 plant cell.— R. Lahmann and C. Vanay : Percentages and 

 oualities of the skins attaclced i)y larv;L- of llypoderma in 

 tne Lyonnaise district. — ^Julcs Chalande : Segmentary 

 division in the myriopods. — E. Roubaud : The biological 

 and morphological variations in Stouioxe mutin in tropical 

 Africa. — .'\. Qruval : Contribution to the systematic study 

 of the Palinuridae. — Pierre Kennal : The adiiw-lymphatic 

 l)odics of some batrachians. — A. Dehorne : Nuclear 

 permutation in the conjugation of Colpidium colpoda. — 

 G. Le Cadat : The registration of a seismic shock by the 

 large Richard barograph at the central Observatory of 

 Indo-China. 



DIARY OF SOCIETIES. 



THURSDAY, May 25. 



RovAL Society, at 4.30.— Experiments on the Compression «f Liquid* at 

 High Pressures: Hon. C. A. Parsons, K.R.S., and .S. S. Cook.— Enerjjy 

 Transfortnations of X-rays: Prof. W. H. Hragg, F.R.S., and H. L. 

 Porter. — Spectroscopic Investigations in connection with the Active 

 Modilic.ition of Nitrogen. I. Spectrum of the Afierglow : Prof. A. 

 Kowler, F.R.S., and the Hon. R. I. Stnitt. F.R S.— An Optic.-il Method 

 of Measuring Vapour Pressures ; Vapour Pressure and Apparent Super- 

 heating of Solid Bromine ; C. Cuthbertson and Mrs. M. Cuthbertson. — 

 The Vacuum-tube Spectra of Mercury : Dr. V. Horton. — The Production 

 of Characteristic ROntgen Radiations : R. Whiddington. 



Royal Institution, at 3. — Air and the Flying Machine. II. Conditions 

 of Safety for Floaters and Fliers: Dr. W. N. Shaw, F.R.S. 



Royal Society of Arts, at 4.30.— N.W. F. Province of India : W. K. H. 

 Merk. 



Institution of Electrical Enginef.rs, at 8.— The Heating of Cables 

 with Current : S. W. Melsom and H. C. Booth. 

 SATURDAY, May 27. 



Rovai. Institution, at 3.— Phases of Bird Life. II. Migration: W. P. 

 Pycr.-ift. 



Aristotelian Society (at Oxford in conjunction with Mind Association). 

 — A Symposium on the Relation of Psychology to Metaphysics : G. F. 

 Stout and A. Smith. 



MONDAY, May so. 



Royal Geographical Society, at 8.30.— The Oeogrnphical Conditions 

 affecting the Development of Canada : Prof. W. L. Grant. 



Aristotelian Society, at 8.— A New Law of Identity : Miss E. E. C. 

 Jones. 



TUESDAY, May 30. 



Royal Institution, at 3.— The .\ncient Volcano of Charnwood Forest 

 (Leicestershire): Prof. W. W. Watts, F.K.S. 



IVEDNESDAY, May 31. 



Institution of Mining and Metallurgy, at 8.— Future Economies 

 in Rand Reduction Plants : C. O. Schmitt. — The Roasting of Complex 

 Ores in Gold Assaying: A. C. Hoare.— A Prospector's Method of Gold 

 Assay : G. M. Austin. 



THURSDAY, June i. 



Royal Society, at ^.y^—Pro/iai/e Paptrs: Experiments on the Restora- 

 tion of Paralysetl Muscles by means of Neive Anastomosis : Dr. R. 

 Kennedy. — The Mechanism of Carbon Assimilation. Part III. : F. L. 

 Usher and J. H. Priestley. — The Action of Radium Radiations upon 

 some of the IVIain Constituents of Normal Blood : Miss Helen Chambers 

 and Dr. S Riis<;.— The Pathocenic .Xgent in a Case of Human Trypano- 

 somiasis in N ' ' H. S. Stannus and Dr. W. Vorke.— The Ex- 

 perimental i of Goitre from Man to Animals: Capt. R. 

 McCarrison. 



•Royal Instituiion, at 3.— Changes Effected by Light : T. Thome 

 Baker. 



ROntgen Society, at 8.15.— On a Possible Therapeutic Use of Strongly 

 Ionised Air: C. E. S. Phillips.— Photographic Action of the Positive 

 Brush Discharge : Charles W. Kaffety. 



Linnean Society, at 8. 



Institution of Mining Engineers, at 11 a.m.— A Fbme Test for the 

 Estimation of Oxygen and Black-damp in Naked-light Mines: Dr. J. S. 

 Haldane, F.R.S. —An Experiment on the Effect of Reversing the Main 

 .\ir-current : James Bain and Dr. J. S. Haldane, F.R.S.— Notes on 

 Contrivances Designed to Prevent Overwinding, with some Instances of 

 their Failure : W. H. Pickering and Granville Poole.— The Otto- 

 Hilgensiock Direct-recovery Process and its Application : Ernest Bury. 

 FRIDAY, June 2. 



Royal Institution, at 9.— Radiotelegraph y : Commendatore G. Marconi. 

 SATURDAY. June 3. 



Royal Institution, at 3.— Types of Greek Women : Dr. W. L. Courtney. 



FORTHCOMING CONGRESSES. 



May 30.— International Sanitary Conference (Prevention of Plague). 

 Paris. 



Junk 28 and 29. — Conference on Education and Training of Engineers. 

 London. President : Mr. Alexander Siemens, President of the Institution 

 of Civil Engineers. General Secretary: Dr. J. H. T. Tudsberj-. 



Jui.v it-22. — International Association of Seismology. Manchester. 

 President : Prof, .\rthur Schuster, F.R.S. 



July 

 Dr. H 



J.-,N 



V 



' AMoctttkw. Bbrninghaa. Preside 



KacM Congraw. Uirfv«r«ity of Loix 

 < .eneral Sacretary : G. SpUkr, 63 South i = 



~Crm::r'^ of French Gcognipbical Socki. 



Jui.v 30 to 

 Science*. S' 

 Dr. Kftng((; 



August.— < 



Al'GUST li 

 Prexidenl : M. Alexi\ >-:ii\-.. ^cr. i.iiy: .M. 

 de Jacr, Bruuel*. 



August 13- ?o. Prfhi.t-ri- "^ 



August 31 i 

 dent : Sir W 

 General Secrn 



SkPTB.MI1I-»< 4 ' . - ( rnt 



of Festival Committee : I'; 



Ski'Trmhkk 9-20. — Intel :isre«« of the 



tricity. Turin. Pre»ideiit .f tii-- ( .mmittee of ) 

 Duke of the Abru»i. Honorary .Secretary of Or 

 Guido Semenza, Via S. Paolo 10, Milano. Inieri.. 

 R. E. Crompton, C. B., K.E., Cromplon I^borator> 



Skpte.miifk 24-30. — International Congress on 

 Address for inquiries: Honorary Secretary ot the N. 

 the Prevention of Conitumption, 20, Hanover Square, 



he SwiM Society of Nataral 

 T. Inquiriet to Secfeiartct : 



venutT of BrMluL 

 Pedolofty. Bnu>-^ 

 \ ital Plat, 35 Avean* 1' 



eiy of France. Nlroet. 



h A«M>ciaiion. PortMnoMh. Pr' 

 F.R.S. AddreM for ioquif.' 

 \V. 

 riiveruty of Christian's. Presi' ' 



f\li(.!ii.jtioti« i,f } 



CONTENTS. 



PAGE 



NO. 2169, VOL. 86] 



Mendelism atid Biology 407 



British Marine Worms. By Prof. F. W. Gamble, 



F.R.S 4cS 



Chemistry for Miners. By H. L. . . ;c.S 



Another Book on Evolution 109 



Phantasms of the Living no 



Irrigation Works 410 



The Crystalline Schists. By A. H 411 



Plant Life of Maryland ... 412 



Our Book bbelf 412 

 Letters to the Editor : — 



Discovery of the Teeth of Pal;uoliihic Man in Jersey. 



(Illustrated.)— V>r. A. Keith 414 



Botanical Research -xi Peradeniya. — Prof. R. H. 



Biffen and others . . 415 



The Heraldic Vale. {Illustrated.) — Prof. T. 



McKenny Hughes, F.R.S. 415 

 Dynamical Enunciations. — Prof. E. H. Barton and 



Prof. A. E. H. Love, F.R.S 415 



Further Experiments with the Gramophone. — Hon. 



Charles A. Parsons. C.B., F.R.S 416 



German East African Dinosaurs. — F. Gillman . 416 

 Breath Figures. By the Rt. Hon. Lord Rayleigh, 



CM., F.R.S 416 



North Sea Fishery Investigations. By J. John- 

 stone . . . 417 



A One-volume Natural History, (fl.ustra/ed.) By 



R. L. 418 



Prof. Johannes Bosscha. By Prof. H. Kameilingh 



Onnes 419 



Notes 4^0 



Our Astronomical Column : — 



Astronomical Occurrences for June .... i-o 



The Tail of Halley's Comet on May 20, 1910 ;r6 



The Spectrum of the Ring Nebula in Lyra 426 



Proper Motions of Stars between -f 75° and -f-8o° 



Declinatijn 426 



The Gyro comjiass . . - 46 



Ancient Observatories in India 426 



The British Solar Eclipse Expedition. (Illustrated) 



By Dr. W. J. S Lockyer 426 



The Work of the Royal Geographical Society. 



By Major Leonard Darwin . 429 

 Organisation and Progress in Economic Biology. 



By W. E. C 430 



Ecological Studies . 43' 



Some Recent Works on Aquatic Animals. (Illus- 

 trated.) ByJ. H. A. . .... 432 



Physical Anthropology of Australasian Races 433 

 The Production and Identification of Artifi.ial 



Gems. {I/ltistrafi\{.) Hy Noel Heaton ... 433 



University and Educational Intelligence .... 435 



Societies and Academies 437 



Diarv of Societies 44° 



Forthcoming Congresses 44° 



