556 



NATURE 



[October 27, 1910 



ence of Dinoflagellae, ccelomic parasites. Syndinium in the 

 pelagic copepods. — A. Fernbach and E. Vulquin : The 

 microbicidal power of macerations of yeast and cereals. 

 The poison elaborated by yeast is not identical with that 

 obtained from cereals. — A. Briquet : Geology of the Gallo- 

 Belgic region. 



OctobeV 17. — M. Kmile Picard in the chair. — P. 

 Helbronner : The complementary geodesic triangulations 

 of the upper regions of the French Alps (eighth expedition). 

 The work done included fixing the position of eighty-seven 

 stations, twenty of which were above 3000 metres altitude. 

 — .\. Jacquerod and M. Turpalan : The application of 

 the principle of .\rchimides to the exact determination of 

 gaseous densities. A bulb of about 200 c.c. in volume is 

 suspended inside a tube of slightly larger dimensions by 

 means of a platinum wire to the arm of a balance, a suit- 

 ah'le counterpoise being suspended from the other arm. 

 The suspended bulb is surrounded by the gas the density 

 of which is being measured, the exact temperature being 

 maintained by an external water bath. The instrument 

 was calibrated by hydrogen and oxygen, the densities of 

 which are exactly known. The accuracy obtainable is of 

 the order of i in 10,000. — G. A. Hemsalech ; The relative 

 duration of the lines of the spectrum emitted by magnesium 

 in the electric spark. The results tabulated confirm the 

 view put forward in a previous paper, that the observation 

 of the relative durations of the lines of the spectrum may, 

 (,n certain cases, furnish useful indications in the analyses 

 of bodies containing unknown impurities. — h. Lafay : 

 The influence of a local heating on the value of the 

 pressures supported bv a body placed in a regular stream 

 of air. — Leo Vigrnon : The influence of chemical affinity 

 in certain adsorption phenomena. — Jean de Rufz de 

 Lavison : The elective r6\e of the root in the absorption 

 of salts. The stem absorbs indifferently, and in the same 

 proportion, salts which are presented to it in solution, 

 whilst, on the contrary, the plant furnished with roots 

 exercises a marked selective action on certain salts. — 

 Victor Henri, A. Helbronner, and Max de Reckling- 

 hausen : New researches on the sterilisation of large 

 quantities of water by the ultra-violet rays. A description 

 of an improvement of the form of apparatus given in an 

 earlier paper. Three-fourths of the rays emitted by the 

 tube are now utilised. An experiment was carried on for 

 six weeks continuously, during which 25 cubic metres of 

 water per hour were passed through the apparatus, with 

 an expenditure of 26 watt-hours per cubic metre of water, 

 the exit water being sterile. — Jules Amar : \ singularity 

 in the working of the human machine. — .'\. Knaoen : 

 Should materials be impermeable or porous? — L. 

 Landouzy, H. Gougerot, and H. Salin : Experimental 

 bacillary serious .u'thritis. — Charles Nicolie, .A. Conor, 

 and E. Conseil : Some properties of the exanthematic 

 virus. — Eugene Daday de Dees : k new phyllopod collected 

 by the .Antarctic expedition of the Pourquoi Pas? — 

 Edouard Danois : The spermaceti organ of Ko_^ia 

 hreviceps. — .A. Pecsi : The lines of fracture of the earth's 

 crust. — Louis Besson : Observations of the upper b'tnn- 

 gent arc of the halo of 46". 



GOTTINGEN. 



Riyal Society of Sciences. — The NackrichUn (physico- 

 mathematical section), part iv. for 19 10, contains the 

 following memoirs communicated to the society : — 



May 28. — L. Geiger : Determination of earthquake foci 

 from the times of arrival. — D. Hilbert : Outlines of a 

 general theory of linear integral equations (vi.). 



July 23. — O. Miigrge : Deformations in the crystals of 

 potassium chlorate (KCTO,), according to investigations 

 by Paul Fischer. — E. Hecke : Non-regular prime numbers 

 and Fermat's theorem. 



DIARY OF SOCIETIES. 



IVEDNESDAY, November 2. 

 Entomological Society, at 8. — E.xperimenis in iqoq and 1910 upon 



Colour-relation between Lep doptcrous [.arvae and Pupas and their 



roundings : Elizabeth Brlcg*!. 

 Society op Public Analysts, at 8.— The Estimation of Lactose in 



presence of the commonly occurring Sugars: Juli.-in L. Baker 



H. F. E. Hulton. — The Colorimetric Estimation of Hydrogen Cyan' 



NO. 



1139, VOL. 84] 



-A Ne 



Polarimelric Estimation of Milk Sugar: 

 ' Method of Estimating Phosphoric Acid : 



A. Chas'on Chapm; 

 H. Droop Richmond 

 G. F. Wesley Martii 



THURSDAY, November 3. 

 Royal Society, at ^.^o.- Praltal'h Papers : The Origin of the Hydro- 

 chloric Acid in the Gastri.- Tubules : Miss M. P. Fitzgerald.— 

 (i) Trypano"ome Disc-ises of Domestic Animals in Uganda. II. Try- 

 fanosoma Brucei. (Plimmcr and Bradford) ; (2) Trypanosome Diseases 

 of Domestic Animals in Uganda. III. T>ypanosoiiia7'ivax {7\^m?t.r\Xi)'. 

 Colonel Sir D. Bruce, C.B., F.R.S., and others.— Further Results of the 

 Experimental Treatment of Trypanosomiasis ; being a Progress Report 

 to a Committee of the Royal Socielv : H. G. Plimmer, F.R.S., Capt. 

 W. B. Fry, and Lieut H. S. Ranken —On the Peculiar Morpho'ogy of 

 a Trypanosome from a case of Sleep'ng Sickness and the possibility of 

 its being a new Species : Dr. J. W. Stephens and Dr. H. B. Fantham — 

 Note upon the Examination of ihe T issues of the Central Nervous 

 System, with Negative Results, of a case of Human '! rypanosomiasis, 

 I'hich apparently had been cured for years by Atoxyl Injections : Dr, 



F. W. Mott, F.R S,— On 

 mas Island : R. Kirkpatri( 



-INNEAN Society, at 8.— I 

 phora: H. B. Bigelow.— 

 W. A. Herdman, F.R.S. 



loNTCEN Society, at 8.15.- 



.rkable Ph; 



id Sponge fiom Christ- 



Phnkton. Part XIII. The Siphono- 

 n Fishing in Hebridean Seas ; Prof. 



-Presidential Address : Dr. G. H. Rodn 



CONTENTS. PAGH 



Ancient Plants. By D. H. S 523 



British Rainfall . . 523 



Indian Crustacea. By W. T. C 524 



Naturalists' Notes from the old Spanish Main . . 525 



Graphical Chemistry . . . . 525 



Amateur Astronomy. By W. E. Rolston 526 



Our Book Shelf . 526 



Letters to the Editor : — 



The Biological Laboratories at Woods Hole. — Francis 



B. Sumner 527 



The Cocos-Keeling Atoll. — Dr. F. Wood-Jones; 



The Reviewer . . 528 



Early Burial Customs in Egypt. — Prof. G. Elliot 



Smith, F.R.S 529 



Effect of Heat on Soils.— C. Harold Wright ... 530 

 The Colours and Spectrum of Water.— T. W. Back- 

 house 530 



Luminous Paint. — R. G. Durrani 530 



Velocity of Negative Ions in Hydrogen at Atmospheric 



Pressure.— A. M. Tyndall 530 



An Irish Pleridosperm. — Prof. T. Johnson .... 531 

 Ferroat's Theorem. — Dr. H. C. Pocklington, 



F.R.S 531 



The Uganda-Congo Boundary. — Edward Heawood ; 



The Writer of the Article 531 



An Agaric with Sterile Gills.— W. B. Grove ... 531 

 Art the Comrade of Science. (IlhtstrateJ.) By 

 E. B. P. 



Ethnography at the British Museum. {Illustrated.) 



By H. S. H 



Sight Tests in the Mercantile Marine 



Structure and Function. (/lliislrattJ.) 



Recent Investigations on Pellagra 



Dr. Melchior Treub 



Dr. Sidney Ringer. By C 



Notes ... 



Our Astronomical Column: — 



A Brilliant Meteor on October 23 



Simulianeous Photographic Observations of a Re- 

 markable Meteor 



Two Remarkable Prominences 



The Relations between Solar and Terrestrial Pheno- 

 mena . . . . . . 



Search-ephemerides for Westphal's Comtt, 1852 IV. . 

 The International Cancer Conference at pans . . . 



Reports of Meteorological Observatories 



Trees and Timber . . 



Selections from American Zoological Work. By 



R. L 



Distribution of Weeds 



The Lancashire Sea-fisheries Laooratory . . 

 Zoology at the British Association, By Dr. J. H. 



Ashworth ... 



Geography at the British Association 



Engineeririg at the British Association 



University and Educational Intelligence 



Societies and Academies 



Diary of Societies 



532 



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