!20 



NATURE 



[February 27, 19 19 



:ysts in vai 



1 



hav< im marked detrimental 1 ffi 1 



k ir hosts. Ill'- parasites are distributed amo 



distinct genera, all belonging to the Sporozoa. O 



• h id been previously recorded 



Vustralia. 11. <•. Smith: The occurrence oi th( 



terpem terpineni in the nil <>f Eucalyptus megacarpc 



Phis somewhat rare terpene has 1 01 previously been 



ected In eucalyptus oils. The oil of this specii 

 consists principally of terpenes with about 30 per cent, 

 of cineol (eucalyptol) and ;i small quantity of the esters 

 geranylacetate and butylbutyrate. The characteristii 

 terpinenenitrosite, m.p. 1 5 5, C, was prepated without 

 difficulty. It is interesting thai terpinene should occui 

 in a species belonging to the earlier portion of tin 

 genus Eucalyptus and in Western Australia, while tin 

 corresponding terpene phellandrene is found in the oils 

 of the more recent species growing in the south- 

 eastern portion of the continent. 



BOOKS RECEIVED. 



The Drift to Revolution. (Papers for the Present 

 Third series. No. 9.) Pp. 52 + iv. (London: Headley 

 Bros., Ltd., 1919.) is. 



The Strawberry in North America : History, Origin, 

 Botany, and Breeding. By Prof. S. W. Fletcher. Pp. 

 xav + 234. (New York: The Macmillan Go.; London: 

 Macmillan and Co., Ltd., 1917.) 8s. net. 



Le Nubi. By Luigi Taffara. Parte prima. Pp. 67. 

 Parte ii., Allante (plates). Tav. xxvi. (Roma : 

 Tjpografia Ditto L. Cecchini, 1917.) 



Joys of the Open Air. By William Graveson. 

 Pp. 115. (London: Headley Bros., Ltd., n.d.i 

 3s. bd. net. 



America at School and at Work. By Rev. Dr. H. B 

 Gray. Pp. xx+172. (London: Nisbet and Co., Ltd., 

 1918.) 5s. net. 



The Spiritual Foundations of Reconstruction: A 

 Plea for New Educational Methods. By Dr. F. H. 

 Hayward and Arnold Freeman. Pp. Ixi + 223. 

 (London : P. S. King and Son, Ltd., 1919.) 10s. 6d. 

 net. 



Dynamics. Part ii. By R. C. Fawdry. (Bell's 

 Mathematical Series.) Pp. vui+ 179-355 +.vii. (Lon- 

 don : G. Bell and Sons, Ltd., 1919.) 2s. 6d. 



The ABC of Aviation. By Capt. V. W. Page. 

 Pp. xii + 13-274 T h 7 plates. (New York : The Norman 

 W. Henlev Publishing Co.; London: Crosby Lock- 

 1. 1 iod and Son, 1918.) ijs. 6<i. 



Standard Tables and Equations in Radio-telegraphy. 

 !'.\ Bertram Hoyle. Pp] xiv+159. (London: The 

 ■\ ii 1 less l'i 1 ss, Ltd . 1919. 1 9s. net. 



DIARY OF SOCIETIES. 



THURSDAY, FtDRDARV 37. 



Rova: I H. It. Lefroy:- How Silk is Grown and 



Mad 



Roval Socn-.i v ii..,. I' 1 fmtt : Scattering of "Light bv Sold 



Substances. Sir lames Dol.bie and Dr. [. I. Fox: The t onstitution ol 

 Sulphui Vapoi , ir. W. G. Dulfield. T. H. Burnham, and A. II. Davis: 

 The Pressure upon the Poles of the Klectric At.:. 



I iild-Stodi 50 t o.-Dr. P. B. liallard : The Claim of the Indi- 



vidual Child. 



Institution of Electrical Engineers, at 6— Dr. S. F. Barclaj aw 

 I)., s i\ s,„ith: The Determination of the Efficiency of the Tulbo- 

 alternator. 



FRIDAY. February a8. . 



Phvsical Society, at s. — Philin R. Coursey : Simplified In,: 

 Calculations, with Special Referenci to Thick Coils.— Dr Ralph Dunstan : 

 Demonstration of Some Acousn i in Connection with Whistles 



and Flutes.-G. A. Brodsky : Demonstration ofa New Polar i«er. 



Roval Institution, at 5.30.— Sir Oliver I odge : Kther and Matter. 

 SATURDAY. Mai n i 



Roval Institution, at 3. — Hon. I. W. Fortes, n. : The Empire's Share in 

 I s Wars— Eastern Europe. 



1. Mrs. \ 



vledge 



Teacher. 



. 'i 1 A. R. 



Ling: Refractoinetry and its Applications in Technical Analysis.— 



I t. in: the Setting Time of Portland Cement.— 



D. '. 11 I I oln 1 1 . w. yeoman : The Deter,,,,,. 



Tolui 111 D 



and I , Butl 11 of Carbon Disalnhi 



Examination of the Various Methods usually employed. 

 TUESDAY. March 4. 

 Roval Institution, at ,.— Pro f . H. Maxwell Lefroy : How Silk is Grown 



-Miill..-, iv Sill:. 

 Roval SOCIETY OP ARTS, at 4.30. — Prof. J. C. McLennan : Science and 



Industry in Canada. 

 Zoological Socif.tv, at 5.30. — Dr. I. A. Murray: Reiiort on the Deaths 



in the Gardens during the Yeai G ...uleiiger : A Collection of 



Fiisbes from Lake Tancanvika, with Descriptions of Three New Species. 



-Miss Joan B. Procter: The Skull and Affinities of Rana stibsigillata, 



A. Dum. 



WEDNESDAY. March 5. 

 Royal Societv of Arts, at 4.30.— B. D. Porritt : The Rubber Industry— 



Past and Present. 

 Geological Society,! at 5.30.— Col. T. W. Edgeworlh David: Geology 



at the Western Front. 

 Royal Aeronautical Societv, at 8.— Capt. A. P. Thurston: The All 



Steel Aeroplane. 



THURSDAY, March 6. 

 Roval Society OF Arts, at 4.10.— W. R. Gourlay : The Need for a 



History of Bengal. 

 Institution of Electrical Engineers, at 6.— G. L. Addenbrooke : 



Dielectrics in Electric Fields. 

 C1111 i.-Sium Soi 11 tv, al 6.-Miss s. Walker: The Training of Teachers, 



from the Child-Study Standpoint. 

 Chemical Societv, at 8.— Prof. I.W.Nicholson: Emission Spectra and 



Atomic Structure. 



FRIDAY. March 7. 

 Roval Institution, at 5.30.— Prof. H. C H. Carpenter : The Hardening 



of Steel. 



SATURDAY. Mai- 

 Royal Institution, at 3. — Sir J. J. Thomson : Spectrum Analysis and its 



Applicati on to Atomic Structure. 



CONTENTS. page 



The Profession of Chemistry 501 



Coniferous Trees 502 



Biologisms Exposed 503 



Our Bookshelf 503 



Letters to the Editor: — 



The Neglect of Biological Subjects in Education. — 



John Parkin .... . 503 



Arthur Eckley Lechmere and Science at Ruhleben. 



-J. W. B 5°4 



Sea Aggression. (Illustrated.) By Dr. Brysson 



Cunningham . . . 5°5 



Some Developments in British Industry during the 



War 506 



Notes 508 



Our Astronomical Column: — 



Comets 5'2 



" Aniuiaire '" of the 'Bureau des Longitudes 512 



The Chemical Detection of Strain in Iron and 



Steel. By H. C. H. C 5'2 



The Ministry of Health Bill 5'3 



Forthcoming Books of Science 513 



University and Educational Intelligence 515 



Societies and Academies 5'7 



Books Received 5 20 



Diary of Societies 5 2 ° 



Editorial and Publishing Offices: 



MACMILLAN AND CO., Ltd., 



ST. MARTIN'S STREET, LONDON, W.C.a 



Idvertisements and business letters to be addressed to the 

 Publishers. 



Editorial Communications to the Editor. 

 Telegraphic Address: Pnusis, London. 

 Telephone Number : Gerhard 8830. 



NO. 2574, VOL. I02] 



