July 15, 1920] 



NATURE 



635 



the measurement of miscibility temperatures with 

 phenol. The miscibiUty temperatures of certain pairs 

 of salts follow very nearly an additive rule ; other 

 salts show marked deviations, and for these the exist- 

 ence of double salts in solution appears probable. — 

 MM. Lespieau and Bourguel : The production of true 

 acetylene hydrocarbons starting from epidibromhvdrin. 

 Compounds of the type CHjICBr-CHoR are readily 

 obtained by the interaction of o-epidibromhydrin and 

 a magnesium alkyl derivative, and from these by three 

 simple reactions good yields of substituted acetylenes, 

 HC:C'CH,R, are produced. Full details of the pre- 

 paration of normal pentine (n-propylacetylene) by this 

 method are given.— E. Chaput : Remarks on the rdle 

 of dislocations in the tectonic of the C6te d'Or. — 

 P. Bonnet : The movements of the seas at the limit 

 of the Permian and the Trias in the geosynclinals 

 of Eurasia. — G. M. Stanoievitch : The aeroplane and 

 hail. Suggestions for the prevention of hailstorms bv 

 aeroplanes.— M. Nobecourt : The anatomical structure 

 of the tubercles of the Ophrydeas. — G. Mangenot : The 

 evolution of the chromatophores and the chondriome 

 in the FloridcEe. — P. Guerin and Ch. Lormand : The 

 plasmolytic action of a certain number of vapours. — 

 MM. Lapicque and Brocq-Rousseu : Marine algae 

 as food for the horse. An account of an experiment 

 on two horses in full work. The oats in the ration 

 were gradually replaced by seaweed {Laminaria flexi- 

 eaulis), and the horses worked normally for twenty 

 days on food from which oats were absent. Then the 

 horses were put to extra heavy work for three days, 

 still on hay and seaweed, and their condition was as 

 good as that of horses doing the same work on the 

 usual food, hay, straw, and oats. — M. Gautiez : The 

 influence of the attitude of the body on respiration. — 

 A. d'Arsonval : Remarks on the preceding communica- 

 tion. — J, Amar : Attitudes of the body and respiration. 

 Walking on the front of the foot, head thrown back, 

 allows large and deep respirations. Walking on the 

 heels has a contrary effect, generally harmful to 

 the health. — R. Wurmser : The action of chlorophyll 

 on radiations of different wave-lengths. — A. L. Herrera : 

 The imitation of cells, tissues, cell-division, and the 

 structure of protoplasm with calcium fluosilicate. 

 Confirmation of the researches of MM. Gautier and 

 Clausmann on the biological importance of fluorine. 

 Calcium fluosilicate produced by the double decomposi- 

 tion of an alkaline silicate and potassium bifluoride in 

 the presence of calcium chloride and water, if the 

 diffusion of the solutions is very slow, gives remark- 

 able imitations of the structure of protoplasm, natural 

 cells, and their division. These imitations can be 

 studied, stained, and preserved by the usual histo- 

 logical processes. — C. P^rez : A new type of Epicarid, 

 Rhopalione uromyzon, sub-abdominal parasite of 

 Ostracotheres spondyli. — J. Dragoiu and M. Fauri- 

 Fremiet : Development of the aerial canals and the 

 histogenesis of the pulmonary epitlielium in the sheep. 

 — W. R. Thompson : Cyrillia angustifrons, parasite of 

 a terrestrial Isopod, Metapotiorthus pruinosus. — P. 

 Thomas and A. Chabas : The estimation of tyrosin and 

 the dibasic amino-acids in the proteids of veast. — 

 A. Mayer, H. Magne, and L. Plantefol : The toxic 

 action of dichloroethyl sulphide.— A. Besredka : An 

 attempt at the purification of therapeutic sera. — 

 F. Ladreyt : Histological polymorphism of certain 

 epithelial neoplasms and the relations between these 

 inflammatory neoformations to. cancerous tumours. 



Sydney. 



Linnean Society of New South Wales, April 28. — Mr. 



J. J. Fletcher, president, in the chair. — G. H. Hardy : 



Synonyms, notes, and descriptions of Australian flies 



of the family Asilidae. As a result of work done since 



NO. 2646, VOL. 105] 



the revision of Australian species of this family by 

 Miss Ricardo in 1912-13, it has become possible to 

 establish the identity of many of the species which 

 were not identified at the time. The present paper 

 deals almost entirely with the genus Neiotamus. Of 

 the forty-seven species usually placed in sub-genera of 

 this genus, twenty are dealt with and placed under 

 twelve species ; two additional species are described as 

 new. — F. Muir : A new genus of Australian Delph- 

 acidae (Homoptera). Most, if not all, of the described 

 Australian Delphacidae are from eastern States. Of 

 the fourteen genera recorded as Australian the author 

 considers only one as entogenic. The genus described 

 as new in this pap>er is from King George's Sound, 

 South-West Australia, and is regarded as entogenic. — 

 Dr. C. P. Alexander : An undescribed species of Clyto- 

 cosmus, Skuse (Tipulidae, Diptera). The genus Clyto- 

 cosmus was proposed by Skuse in 1890, and has 

 remained monotypic until now, the type species being 

 C. Helmsi from Kosciusko. A second species is here 

 described as new from Ulong, on the Dorrigo table- 

 land. 



Books Received. 



A Text-Book of Organic Chemistry. By E. de B. 

 Barnett. Pp. xii+380. (London : J. and A. Churchill.) 

 15s. net. 



Johnston's New Era School Atlas. Pp. 40. (Edin- 

 burgh : W. and A. K. Johnston, Ltd. ; London : Mac- 

 millan and Co., Ltd.) i^. net. 



Orographical, Regional, Economic Atlas. Part i. : 

 British Isles. Pp. 32. (Edinburgh : W. and A. K. 

 Johnston, Ltd. ; London : Macmillan and Co., Ltd.) 

 IS. 6d. net. 



Notes on Dynamics : With Examples and Experi- 

 mental Work. By T. Thomas. Pp. 123. (London : 

 Crosby Lockwood and Son.) 6s. net. 



The Nomenclature of Petrology. By Dr. A. 

 Holmes. Pp. v+284. (London: T. Murby and Co.) 

 I2S. 6d. net. 



The Botany of Iceland. Edited by Dr. L. K. 

 Rosenvinge and Dr. E. Warming. Vol. ii., part i. 

 Pp. 248 + 5 plates. (Copenhagen: J. Frimodt; 

 London : J. Wheldon and Co.) 



The Life and Work of Sir Jagadts C. Bose (an 

 Indian Pioneer of Science). By Prof. P. Geddes. 

 Pp. xii+259. (London : Longmans, Green, and Co.) 

 i6s. net. 



Meddelelser fra Kommissionen for Havunders0gel- 

 ser. Serie' Fiskeri. Bind 5, No. 9, 1919. Investiga- 

 tions as to the Effect of the Restriction on Fishing 

 during the War on the Plaice of the Eastern North 

 Sea. By Dr. A. C. Johansen and Dr. K. Smith. 

 Pp. 53. Serie Fiskeri. Bind 6, No. i, 1920. On 

 the Occurrence of the Post-larval Stages of the 

 Herring and the " Lodde " (Clupea harengus, L., and 

 Mallottis villosus, O. F. M.) at Iceland and the 

 Faeroes. Bv P. Jespersen. Pp. 24. (Kobenhavn : 

 C. A. Reitzel.) 



Fisheries. England and Wales. Ministry of Agri- 

 culture and Fisheries. Fishery Investigations. 

 Series ii. : Sea Fisheries. Vol. iv.. No. 3. Report 

 on the Scales of some Telcostean Fish, with special 

 reference to their Method of Growth. By G. W. 

 Paget. Po. 24+4 olates. 3s. 6d. net. Series iii. : 

 Hydrograohv. Vol. i. : The English Channel. 

 Part 3 : The Section from the Isle of Wight to Havre. 

 Review of the Phvsical and Chemical Properties of 

 the Surface Waters, and the Variations of these Pro- 

 perties from .August, 1904, to December, 1918, in 

 Cotnnarison with Corresponding Variations on the 

 Sections discussed in parts i and 2 of this volume. 



