November io, 1923] 



NATURE 



1 1 



acid rocks are regarded as synonymous. It is shown 

 that this equivalence is not always legitimate. In 

 the new classification, doliomorph types are not 

 classed with rocks of the same qualitative mineralogical 

 composition, but with those ot the same chemical 

 composition, with some of which they are hetero- 

 morphs. — Jean Perrin : Radiochemistry and fluor- 

 escence. Results of measurements on the disappear- 

 ance of " new methylene blue " under the action of 

 light, completing the theory proposed in an earlier 

 communication (C.r., 1923, p. 612). — L. Joubin : 

 The meeting of the International Council for the 

 Exploration of the Sea, held at Paris. An account 

 of the work done by the committees. — V. Grignard, 

 J. Doeuvre, and R. Escourrou : The constitution of 

 natural methylheptenone. The ketone exists in two 

 isomeric forms, and this has given rise to some un- 

 certainty regarding its constitution. The authors 

 have applied the method of oxidation by ozone and 

 have estimated the oxidation products, formaldehyde 

 (with formic acid and carbon dioxide) characterising 

 the a-form, acetone the )3-form. Methylheptenones 

 from four different sources were examined by this 

 method, and it was shown that the natural ketone 

 is a mixture of both forms ; the a-fomi is in the 

 smaller proportion, about 25 per cent. — Ervand 

 Kogbetliantz : The unicity of trigonometrical series. — 

 F. H. van den Dungen : Integral equations, with 

 several parameters and their technical applications. — 

 N. Vasilesco Karpen : The mechanism of hovering 

 flight. — J. Guillaume : Observations of the sun made 

 at the Observatory of Lyons during the third quarter 

 of 1923. Owing to bad weather, observations were 

 possible on only sixty-two days during the quarter. 

 The usual tabular summary is given. — Mile. St. 

 Maracineanu : A method of measurement suitable 

 for a strong radiation. The method described is 

 applied to the cases of polonium and actinium. — 

 Claude Bonnier : Aqueous solutions of ammonium 

 bicarbonate. When ammonium bicarbonate is dis- 

 solved in water in a closed vessel, there is evolution 

 of gas, and pressure is set up. In the present note 

 the influence of concentration of the solution and of 

 the ratio of the volumes of the liquid and gas phases 

 on the pressure is studied, and the experimental 

 results expressed in the form of curves. — M. Bourguel : 

 The preparation of true acetylene hydrocarbons by 

 sodium amide, starting with 2-3-dibrompropylene. 

 Hexine and cyclohexylpropine. The dibrompropyl- 

 ene, CHjBr . CBr : CHj (prepared from allyl bromide), 

 is treated with a magnesium alkyl bromide, RMgBr, 

 under conditions exactly defined, giving the bromide, 

 R . CHj . CBr : CHj, and hydrogen bromide is removed 

 from this by treatment with sodium amide. The 

 hydrocarbons obtained are true acetylenes, and the 

 method is a general one. — Raymond Delaby : Tlic 

 catalytic dehydration of ethylglyccrol. — J. F. Durand ; 

 Double decompositions, in aqueous solutions, between 

 metallic acelylides and salts. — Jean Bordas : A cause 

 of error in the lodlbaucr method for the estimation of 

 total nitrogen. The presence of tannins in sub- 

 stances analysed by this method causes errors due 

 to loss of nitrous fumes. — P. Gaubert : The planes of 

 Grandjean. — Emile Belot : A form of latent vulcanism 

 in connexion with earthcjuakes and tidal waves. The 

 cx{x?rimental reproduction of a tidal wave. — E. 

 Rothi : The earthquakes observed in France in the 

 course of the year 1922. Fourteen shocks were felt 

 during the year, a number much .ligher than the 

 average. Details arc given of each. — Ken6 Souiges : 

 The cmbryogcny of the Joncaceae. The development 

 of the embryo in Luzula Forsleri. — V. Lubimenko : 

 The influence of leaf wounds on the production of dry 

 <,ihv.t:iti. «■ ill .ri.<n Til.ints. — E. Lesn* ;uul \I Vagliano : 



'U 112J 



The differentiation of vitamin A and the factor pre- 

 venting rickets. — F. Vincens : A disease of the bee 

 (muscardine) due to Beaiiveria Bassiana produced 

 experimentally in bees. This fungus, when present 

 in the food, is readily communicated to bees, causing 

 death within six days. — E. Roubaud and J. Des- 

 cazeaux : A bacterial agent pathogenic to the common 

 fly. Bacterium delendcB - musccB. This new cocco- 

 bacillus was isolated from a spontaneous infection 

 which occurred during the study of Stomoxys cal- 

 citrans. Details are given of its morphology and 

 culture. The domestic fly is very resistant to 

 bacterial infection, and the fact that it is attacked 

 and killed by the new type is of great interest. — A. T. 

 Salimbeni and Y. Kermorgant : A new spirochaete 

 met with in the blood of patients suffering from 

 measles. — Femand Wyss : Variation in the mor- 

 phology and acido-resistance of the human tubercle 

 bacillus under the influence of a saponine. 



Official Publications Received. 



Memoirs of the Department of AKricullure in India. Botanical Series 

 Vol. 12, No. -2. 1 : History of the Operations against UiuUrot of Palms 

 in South India; 2: Inoculation Experiments with /'/i,i/<'ip/i(/iom jxiimirora 

 Butl., on Borassus flabellifer Linu., and Cocos nuci/era Linn. By W. 

 McRae. Pp. iv + -21.70. Botanical Series, Vol. 12, No. 3: Stndies in 

 Inheritance in Cotton, I. History of a Cross between Gossypium herbacuni 

 and Gossyinum neglectum. By G. L. Kottur. Pp. iv+71-l33. (Calcutta : 

 Thacker, «pink and Co.; London : W. Thacker and Co.) 1.4 rupees; 

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Bulletin of the Imperial Institute. Vol. 21, No. 1 : Report on the 

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Bojiort of tlio Council of the Natural History Society of Northumber- 

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Canada. Department of Mines : Geological Survey. 'I'^port, 



i;»22, Part A. Pp. 14,5a. Summary Report, 1922, I i i'. 98d. 



(Ottawa : F. A. Acland.) 



Canada. Dei>artmont of Mines : Geological Survey. Memoir 133, No. 

 114 Geological Series: The Southern Part of the 8y<lney Coal Field, 

 Nova Scotia. By A. O. Hayes and W. A. Bell. Pp. 108. Memoir 134, 

 No. 115 Geological Series: Brockvillo-Mallorytown Map-area, Ontario. 

 By J. F. Wright. Pp. t>3-f-4 plattis. (OtUwa : F. A. Acland.) 



Canada. Department of Mines : Victoria .Memorial Mu.seum. Bulletin 

 No. 37, Anthropological Series, No. 8 : An Album of Prehistoric Canadian 

 Art. By Harlan I. Smith. Pp. iii-f-195. (Ottawa: F. A. Acland.) 

 r)0 cents. 



Departement van I<andbouw, Nijverheid en Handel: "'8 Lands 

 Plantontuin" (.lardin Botanicpie d« Buitenzorg). Treubia : Recueil de 

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 Livrai-son 1. Pp. 126. Vol. 3, Livralson 2. Pp. 127-242. Vol. 3, 

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University College of the South-West of England : Session, l'.>22-23. 

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County Council of the West Riding of Yorkshire. Nineteenth Annual 

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Lawes Agricultural Trust: Rotliamsted Experimental Station, Harpen- 

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 (llHriK>nden.) 2,«. M. 



I'lie National Institute of Agricultural Botany. Kmutli It. port and 

 -Vccounts, l"»22-2.i. Pp. 16. (Cambridge.) 



Stateiis Meteorologlsk-llydrognillska Anstalt. Arsbok, 3, 1921. IV : 

 .Meti'orologiska iaktUgt-l.ser i Hverige, Band 63 (IV: Observations 

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Me<Meland<m frAu Statens Mefoorologisk - Hydrograflska Anstalt. 

 Band 2, No. 1 : Vegelatlonens Arllga utvecklingaghng I SveaUnd. By H. 

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The Indian Forest Reoorils. Vol. 10, Part 1 : The Conatituents of some 

 {i„linM K-,..„i, ,i(i.u itv .i.ilin Lionel Simonsen. Part II : The Easentlnl 

 Oil • ^iis toruluMi, Don. Pp. 10. (Delhi : Govern- 



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■\ I n-wm iirC.iiKiiln fnr till \i-!u I'.'JI : liHludinir 



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N<M ■ 



by 1... ■■ : , ■■ I , ■■; -■ 



of the Dominion n( Ijinndn.) Twniily-niglilli Vn«i of Usiin. I'p. 75. 

 (OtUwa : F. A. Acltml.) 



Tide Tnble.H for ••- i'..-.ii.. i '..uhi < .,i ( ■..n»d» for the Year ll'l!-» : in.-ln.linir 

 Furn Stiilit, tie Northern Coast : < 



Slack Water in I Narrows, and li 



Currents. (Issi j ,,, 1 ; .... lit Survey in the I> , A 



Marine and Fisheries of the Dominion ol Canada.) Twenty-fouilli Year of 

 Issue. Pp.75. (Oltjiwa: F. A. .\rlniid.) 



Mniittisnnlan liiHtitn" '<■•• ' -^ ' KH.".^'.. -v UnlL.t in 7'i : 



