MaY^ 12, 192 l] 



NATURE 



351 



stereoscopic reconstruction of magnified microscopic 

 objects. — A. Duboin : The constitution of smalt. 

 Details for the preparation of this colouring matter 

 are given, the analysis of which leads to the formula 

 K:0,CoO, 38102 as 'representing its composition. — G. 

 Claude : The manufacture of hydrogen for the syn- 

 thesis of ammonia. With a view to the utilisation of 

 hydrogen from water-gas, experiments on the solu- 

 bilities of hydrogen and carbon monoxide in various 

 solvents at high pressures (up to 1600 atmospheres) 

 and at varying temperatures were carried out. A 

 diagram is shown giving the results of the solubility 

 experiments for hydrogen and carbon monoxide at 

 20° C. and —40° C. in ether. It is concluded that by 

 using ether the commercial separation of these two 

 gases under pressures of about 100 atmospheres and 

 temperatures of the order of —50° C. would easily give 

 hydrogen containing less than 02 per cent, of carbon 

 monoxide. — M. Vezes : The composition of French tur- 

 pentine. The proportions of pinene and nopinene are 

 determined by a polarimetric method.- — L. Palfray : 

 The cresyl cyanocampholates and their reduction pro- 

 duct. — R. Cornubert : The oxidation with perman- 

 ganate of oa-methylallylcydohexanone in alkaline 

 solution. — E. Andre : The determination of the acetyl 

 figure of fatty materials. A simplification of the 

 Lewkowitsch method. — L. Cayeux : The existence of 

 numerous halcyon spicules in the Jurassic iron 

 minerals of France. — P. Russo : The geological situa- 

 tion of the volcanoes of Oudjda, eastern Morocco. — 

 M. de Montessus de Ballore: The longitudinal depres- 

 sion of Chile. — L. Blaringhem : The variations and fer- 

 tility of the hybrid Primula variabilis compared with 

 those of its parents, P. vulgaris and P. officinalis.- — 

 P. Dangeard, jun. : The evolution of the aleurone 

 grains in ordinary vacuoles and the formation of 

 tannins. — L. Destouches : The prolongation of life in 

 Galleria mellonella. At the most favourable tempera- 

 ture, 37° C, the total evolution of the caterpillars of 

 Galleria from the egg to the butterfly is about fourteen 

 days. This period can be progressively lengthened by 

 lowering the temperature. By submitting the cater- 

 pillars for periods of twenty-four hours alternately to 

 temperatures of 1° C. and 37° C. the life can be pro- 

 longed to thirty-five days, and at the same time the 

 production of eggs is more than doubled. — L. Mac- 

 Auliffe and A. Marie : An anatomo-physiological study 

 of a Japanese method of abdominal massage. — A. 

 Peyron : The mode of development and the varieties 

 of tumours of the ovotestis. — J. Legendre : The biology 

 of the Madagascan perch. 



Rome. 

 Reafe Accademia nazionale dei Lincei, February 20. — 

 Original papers by fellows : — G. Castelnuovo : Abelian 

 functions, ii. : The geometry of Abelian varieties. — 

 C De Stefani : Ligurian siliceous sponges, iv, : 

 Eocene, lower strata, valley of the Iso and Cairo 

 (Italy). — A. Issel : First steps in the systematic ar- 

 rangement of geological marks. The author pro- 

 poses to divide them into nine classes, namely, cosmic 

 marks (meteorites), atmospheric marks, hydrospheric 

 marks, hydro-mineral marks, volcanic marks, tec- 

 tonic marks, plutonic marks, glacial marks, and 

 physiological marks. — Papers communicated through 

 fellows :■ — L. TonelH : Two propositions of Lindeberg 

 and Levi in the calculus of variations, ii. — O. Laz- 

 zarino : Variations in kinetic energy of a semi-rigid 

 rotating system. — M. Pascal : Superficial circulation, 

 ii. Vectorial expressions and general theorems 

 analogous to ordinary circulation theories. — C. 

 Perrier : The true nature of Rosasite. This mineral, 

 discovered in a mine at Rosas, in Sardinia, in the 

 form of crystals, is mainly compounded of copper 



NO. 2689, VOL. 107] 



oxide, copper carbonate, and zinc carbonate. — E. Bora : 

 Contributions to the natural history of Anopheles and 

 their extermination (in connection with Prof. B. 

 Grassi's anti-malaria campaign at Fiumicino, near 

 Rome), iii. The author gives statistics regarding the 

 hours of the day and night at which the mosquitoes 

 enter buildings and commence their attacks. It 

 apf)ears that they rarely attack until some time after 

 their entry. In a second part of the note the author 

 gives evidence in support of the view that fishes and 

 ducks are inefficacious in attacking and keeping down 

 the larvae. — A. Lo Surdo : Binaural localisation of 

 pure sounds. In order to test the theory according 

 to which perception of the direction of a source of 

 sound is due to the difference of phases of the waves 

 as they reach the two ears, the author has constructed 

 an experimental apparatus in which a source of sound 

 is connected with the ears by two tubes, one of which 

 at least can be varied so as to be made longer or 

 shorter than the other at will. If the difference of 

 path is less than half a wave-length, the sound appears 

 to come from a source in the direction of the shorter 

 path ; if the difference is exactly equal to a wave- 

 length, the source appears to be in front, and, 

 as should be expected from theory, the apparent direc- 

 tion of the source now varies when one path is in- 

 creased or decreased in just the same way as it would 

 vary if we started with the two paths equal. — The 

 Secretary (Prof. Castelnuovo) announced that ten 

 candidates submitted works in competition for the 

 prize for physical and chemical sciences offered by 

 the Minister of Public Instruction, and one candidate 

 for the Carpi prize. 



Books Received. 



The Man who Did the Right Thing : A Romance 

 of East Africa. By Sir Harry Johnston. Pp. vii-h 

 444. (London : Chatto and Windus.) 8s. 6d. net. 



The Elements of Illuminating Engineering. By 

 A. P. Trotter. (Technical Primers.) Pp. xi+103. 

 (London : Sir I. Pitman and Sons, Ltd.) 2s. 6d. net. 



Cours de Physique g^n^rale. By Prof. H. Ollivier. 

 Tome premier. Deuxieme Mition. Pp. 749 + iii 

 planche. (Paris: J. Hermann.) 45 francs net. 



The New Philosophy of Modern Science. By Dr. 

 W. W. Strong. Pp.' viii+ 194. (York, Pa. : ' Kyle 

 Printing Co.) 



Hiroshige. By Yone Nogouchi. Pp. ix+38+xix 

 plates. (New York : Orientalia ; London : Elkin 

 Mathews.) 255. net. 



The Electrical Transmission of Photographs. By 

 Marcus J. Martin. Pp. xi-l-136. (London: Sir I. 

 Pitman and Sons, Ltd.) 6s. net. 



The Extra Pharmacopoeia of Martindale and West- 

 cott. Revised by Dr. W. Harrison Martindale and 

 W. Wynn Westcott. Seventeenth edition. Vol. ii. 

 Pp. xxxii + 688. (London : H. K. Lewis and Co., 

 Ltd.) 17s. 6d. net. 



Laboratories : Their Planning and Fittings. By 

 Alan E. Munby. Pp. xix-l-220. (London : G. Bell 

 and Sons, Ltd.) 25s. net. 



A New British Flora : British Wild Flowers in 

 their Natural Haunts. Described by A. R. Horwood. 

 Vol. v. Pp. xi-l-234-l-l-lxiv plates. Vol. vi. Pp. xix+ 

 232. (London : Gresham Publishing Co., Ltd.) 

 I2S. 6d. net each vol. 



Storia della Geometria descrittiva dalle Origin! 

 sino ai Giorni Nostri. By Prof. Gino Loria. 

 (Manual! Hoepli.) Pp. xxiy+584. (Milano : U. 

 Hoepli.) 25 lire. 



Famous Chemists : The Men and their Work. By 



