November 7, 19 12] 



NATURE 



299 



Heckel ; Cultural bud mutation of Sulantim immite. 

 The mutation of the tubercles was obtained after only 

 one year's culture. — A. Schaumasse : The provisional 

 eiiments of the comet 19126. — G. Fayet : Probable 

 identity of the new comet 19126 with the Tuttle 

 periodic comet. By its approach to Jupiter the Tuttle 

 comet would appear to have undergone perturbation 

 which would account for its advance by eighty-six 

 days. — J. Ouillaume : Observations of the sun made at 

 the Observatory of Lyons during the first quarter of 

 1912. Observations were possible on sixty days, and 

 the results are summarised in three tables, showing 

 ihc number of spots, their distribution in latitude, and 

 th;' distribution of the facul^e in latitude. — M. Bor- 

 relly : Observations of the Gale comet (1912a) made 

 with the comet-finder at the Marseilles Observatory. — 

 A. Petot : Certain conjugate systems. — Maurice 

 (jevrey : Remarks on certain theorems of existence. 

 A discussion of a class of functions previously con- 

 sidered by Holmgren. — Georges Remoundos : The 

 theorem of Picard and multiform functions. — A. 

 tiuillet and M. Aubert : An electrometric spark-gap 

 <oiisisting of two conducting spheres. Calculation of 

 the charges, the potentials, the mutual action, and the 

 disruption. — Ch. Fery : The principle of a new method 

 of measuring the velocity of light. An application of 

 the rotating mirror method, in which an electricall)- 

 ■controlled tuning-fork measures the angular velocity 

 of the mirror. — A. Boutaric and C. Leenhardt : Cryo- 

 scopy in decahydrated sodium sulphate. Measure- 

 ments of the molecular lowering of the freezing point 

 with urea as the solute gave 32'05 as the value of the 

 Van't Hoff constant; the figure 32'o8 was obtained by 

 the application of the usual formula to the latent heat 

 ■ of transformation of sodium sulphate. — Paul Job and 

 Marcel Boll : The photochemical hydrolysis of very 

 dilute solutions of chloroplatinic acids. — M. Hanriot : 

 The tempering of metals. The author extends the 

 meaning of a tempered metal to any metal which, after 

 sufficient annealing, changes its physical properties, 

 chemical changes being excluded. — Daniel Berthelot and 

 Henri Gaudechon : The different modes of photo- 

 chemical decomposition of glucose and galactose ac- 

 cording to the wave-length of the radiations. A com- 

 parative study of the quantity and nature of the gases 

 evolved from glucose and galactose in solution under 

 the influence of ultra-violet light of three different 

 wave-lengths. — H. Baubigny : Study of the double sul- 

 phites of mercur}' and the alkalis. The decomposition 

 of solutions of the double sulphite of mercury and 

 sodium differs from that of the corresponding salts 

 ■of silver and copper in that no trace of dithionic acid 

 is produced. — Maurice Lanfry : The action of hydrogen 

 peroxide upon dithienyl-thiophene. — A. Guyot and A. 

 Kovache : The action of formic acid upon the triaryl- 

 ■carbinols. All triarycarbinols, heated with a mixture 

 of formic acid and a little dry sodium formate, are 

 quantitatively reduced to the corresponding hydro- 

 carbon, the amount of carbon dioxide produced being 

 an exact measure of the reduction. The generality of 

 the reaction is shown. — Andr6 Meyer : Some new de- 

 rivatives of phenylisoxazolone. — Marie Korsakoff : 

 Researches on tfie methods for the estima- 

 tion of saponines. — Leclerc du Sablon : The in- 

 fluence of light on the transpiration of green 

 leaves and of leaves without chlorophyll. — M. 

 Ringelmann : Calculation of the yield of small water 

 channels in irrigation. — R. Fosse : Researches on urea. 

 Urea is frequently present in the higher plants, 

 although in very small proportions. It cannot be con- 

 sidered as proved that the urea is a physiological pro- 

 duct of the plant cell. — Victor Henri, Andre Helbronner, 

 and Max de Recklinghausen : A new, vrrv powerful 

 lamp for the production of ultra-violet light and its 

 tatilisation for the sterilisation of large quantities df 

 NO. 2245, VOL. 90] 



water. The U-shaped lamp can be used on a 5uo-volt cir- 



' cuit, and requires 1150 waits, giving a canaie-power ot 



[ about 8000. — Em. Bourquelot and M. Bride! : Syntheses 



I of glucosides of alcohols witn the aid of emulsin. 



I /3-iioFropylglucoside and (i-isoamylglucoside. — i\L 



! Tiffeneau and H. Bosquet : The role of caffeine in the 



diuretic action of coffee. Coffee loses the greater part 



of its effects on the renal secretions if the caffeine has 



been removed. Caffeine is the principal, if not the 



exclusive, agent of the diuretic action of coffee. — 



Robert Odier : Sensitised streptococcus and sarcoma. — 



B. Sauton : The mineral nutrition of the tubercle 



bacillus. — Max Kollmann ; Some points on the anatomy 



of the male genital organs of Lemurs. 



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