240 



NA TURE 



[July 9, 1903 



ations on the new Borrelly comet made at the Paris Observ- 

 atory, by M. G. BiKourdan. — Observations on the Borrelly 

 comet made with the 3i-8cm. equatorial at the Observatory 

 of Algiers, by MM. Rambaud and Sy. — Observations on 

 the Borrellv comet made at the Paris Observatory, by M. 

 Salot.— ODservations on the comet 1903 c (Borrelly) made 

 at the Observatory of Besangon, by M. P. Chofardet.— 

 Observations on the Borrelly comet made with the Brunner 

 16cm. equatorial at the Observatory of Lyons, by MM. J. 

 Quillaume and G. Le Cadet. — The influence of altitude 

 on the duration of the reduction of the oxyhaemoglobin in 

 man, by M. A. H^nocque. The effect of living at alti- 

 tudes of 1000 to 2000 metres is to produce a marked pro- 

 longation in the duration of the reduction of the oxyhaemo- 

 globin, a phenomenon which gives a new explanation of 

 the adaptation of the human body to these heights. — On 

 the integration of series, by M. W. H. Young. — On the 

 experimental laws of sliding friction, by M. Henri 

 Chaumat. — The electrotypograph and the teletypograph, 

 by M. de Tavern ier. — On the theory of nickel steels, by 

 M. C. E:. Guillaume. Nickel steels' can be classified in 

 two divisions, according as they do or do not possess a 

 thet mal hysteresis. — On the spontaneous dichroism of mixed 

 liquids, by M. Georges Meslin. All liquids which possess 

 spontaneous dichroism are also those which are the most 

 active under the influence of the magnetic field ; the re- 

 ciprocal of this is also true. — On the phenomena connected 

 with the mast in wireless telegraphy, by MM. Andr^ Broca 

 and Turchini. — The relation between the dielectric co- 

 hesion of a gas and its temperature, by M. E. Bouty. 

 For temperatures between 20° C. and 190° C, air, hydrogen 

 and detonating gas possess a dielectric cohesion which is 

 independent of the temperature, from which the law is 

 deduced that the dielectric cohesion of a gas or of a mixture 

 of gases depends only on the mean distance of the mole- 

 cules. — Determination of the electrochemical equivalent of 

 silver, by MM. Pellat and Leduc. A detailed account is 

 given of the numerous precautions observed in this deter- 

 mination, the mean result being 0011195. — On the electro- 

 lytic transport of certain ions in gelatin, by M. Aug. 

 Charpentier. — The production of ozone in spirals with high 

 tension currents of high frequency, by M. H. Guilleminot. 

 —Positive accumulator plates of high capacity, by M. 

 Vaugeois. Capacities of from 07 to 124 ampere-hours 

 per square decimetre of plate have been obtained. — On 

 recent results obtained in the treatment of arterial hyper- 

 tension by d'Arsonvalisation, by M. A. Moutier. — A_ new 

 method for putting in evidence ultra-microscopic objects, 

 by MM. A. Cotton and H. Mouton. — On the anticipated 

 liquefaction of oxygen from air, by M. Georges Claude. 

 If air is liquefied progressively, the first portions are rich 

 in oxygen. — Study of the mode of oxidation of manganese 

 salts by alkaline persulphates in acid liquids, by M. H. 

 Baubigny. — The preparation and properties of some new 

 plumbic derivatives, together with their thermochemical 

 data, by M. Albert Colson. — On an organic base contain- 

 ing phosphorus, its constitution and some of its salts, by 

 M. P. Lemoult. The substance obtained by the inter- 

 action of PCI- and aniline has not the constitution 

 PCl(NH.CeH-)^''ascribed to it by Gilpin, but is more prob- 

 ably the hydrochloride of a new base, (C,H,.NH)P.N.C,H,, 

 various salts of which are described. — The volumetric 

 estimation of nitric nitrogen, by M. Debourdeaux. — On 

 silicon amide and imide, by MM. Em. Vig:ouroux and 

 Husot. The amide is produced by the interaction of silicon 

 tetrachloride and ammonia at temperatures below 0° C, 

 above 0° the imide is the chief product. — Combinations of 

 hydroferrocyanic acid with organic compounds, by MM. 

 Chretien and Guinchant. — The preparation of primary 

 alcohols by means of the corresponding acids, by MM. L. 

 Bouveault and G. Blanc. The methyl and ethyl ester of 

 the fatty acid is reduced by sodium in the presence of 

 absolute alcohol. Details are given for octanol.^ — The in- 

 fluence of the nature of the external medium on the form- 

 ation and evolution of odoriferous compounds in plants, by 

 MM. E. Charabot and A. Hebert. — New method for the 

 estimation of oxalic acid in urine, food, &c., by M. 

 Aibahary. — On the production of glucose by animal 

 tissues, by MM. Caddac and Maignon. — Researches on 

 the transversal scalariform striated bands in the cardiac 

 fibres, by M. F. Marceau. — The action of carbon dioxide 

 on the eggs of echinoderms, by M. C. Viguier. The 



theory of temporary poisoning of Delage is not true for 

 the sea urchins ; carbon dioxide is not clearly differentiated 

 from other reagents used in experiments on artificial par- 

 thenogenesis. — On the development of the ovary of 

 Polyxenus lagurus^ by M.' A. Ldcaillon. — The action of 

 emulsin on salicin and amygdalin. Theory of the action 

 of emulsin, by MM. Victor Henri and S. Lalou. The 

 emulsin forms an intermediate compound with the body 

 upon which it is acting, and this is decomposed, regener- 

 ating the ferment. — On the teratological forms of 

 Sterigmatocystis nigra deprived of potassium, by MM. 

 Molliard and H. Coupin. — On Cryptostegia madagascar- 

 iensis, by M. Henri Jumelle. — On a new group of fungi, 

 the Bornetineae, and on Bornetina Coriuni of the vine, by 

 MM. L. Mang-ln and P. Viala. — On the bilateral symmetry 

 of the rootlets of Pontederia crassipes, by M. ChiffTot. — On 

 the presence of macroscopic crystals of albite in the dolo- 

 mites of the Trias of Crete, by M. L. Cayeux. — Observ- 

 ations on glacial phenomena in Corsica, by M. Paul 

 Castelnau. — On the existence of two great circles of 

 maximum seismic instability, by M. de Montessus de 

 Ballore. — On a chicken which lived seven days after 

 hatching out, with a second yolk enclosed in the abdomen, 

 by M. Fr(§d6ric Houssay. — Apparatus for the inhalation of 

 oxygen, by M. Gugrlielminetti. — The variable state of 

 active muscles during the time of a contraction in the 

 ergograph, by MM. A. Imbert and J. Gagrnifere. — Dust 

 shower recently observed in Iceland, by M. Stanislas 

 Meunier. 



CONTENTS. PAGE 



Recent Work on Optics. By Edwin Edser .... 217 

 Prevention of Accidents in Factories. By G. H. 



Baillie 219 



A New Swiss Handbook 219 



Our Book Shelf:— 



"The Fauna of British India, including Ceylon. and 



Burma," vol. ii ... • • 220 



Schneider: " Dendrologische Winter.studien" . . 220 



Sartori : " La Tecnica delle Correnti Alternate " . 221 

 Kieffer : " Monographie des Cynipides d' Europe et 



d'Algerie" 221 



Cook: "Spirals in Nature and Art " • •■ • . . 221 



Henri: " Lois generales de I'Action des Diastases" 221 



Fron : "Sylviculture" 221 



Letters to the Editor : — 



Radium and Solar Energy.— Dr. W. E. Wilson, 



F.R.S 222 



" Red Rain " and the Dust Storm of February 22. — 



Prof. T. E. Thorpe, F.R.S. 222 



Dust Storms in New Zealand.— P. Marshall . ... 223 



Science and Naval Promotion. — N. G. T 223 



Purple Flowers. — Capt. F. W. Huiton, F.R.S. . 223 



The Origin of Variation. — Charles S. Myers . 224 



The British Association. By F. H. Cheetham . 224 

 New Serum Department of the Jenner Institute. 



{IVM Diagram.) 227 



Archaological Discoveries in Crete and Egypt . . 229 



White Spot on Saturn. By W. F Denning . . . ^29 



Notes 230 



Our Astronomical Column :— 



Comet 1903 c 233 



Penetrative Solar Radiations 233 



The Spectra of Metals and Gases at High Tem peratures 234 



Zenith-telescope Results 234 



Photomicrography with a Brownie Camera, {///tts^ 



trated.) By W. Moss 234 



Seismological Notes . . 235 



Ethnographical Studies in North Queensland. By 



A. C. H 235 



University and Educational Intelligence 236 



Societies and Academies 237 



NO. 1758, VOL. 68] 



