February 17, 192 1] 



NATURE 



819 



Ministry of Finance, Egypt. Note on the Pro- 

 gramme and Policy of the Government with Regard 

 to the Investigation and Development of the 

 Petroleum Resources of Egypt. By V.. M. Dowson. 

 Pp. v + 48. (Cairo: Government Press.) P.T. lo. 



Transactions of the Royal Society of South Africa. 

 Vol; ix., part 2, 1921. (Cape Town: The Society; 

 London : VV. Wesley and Son.) i8s. 6d. 



Products of the Empire. By L. Clinton Cunning- 

 ham. Pp. 299. (O.xford : Clarendon Press.) 5i-. 6d. 

 net. 



Why do We Die? By T. Bodley Scott. Pp. 123. 

 (London : T. Fisher Unwin. Ltd.) 6s. net. 



Calendario della Basilica Pontificia del Santissimo 

 Rosario in Valle di Pompei per I'Anno 1921. Pp. 

 224-1-63. (Valle di Pompei.) 



Elements of the Mathematical Theory of Electricity 

 and Magnetism. By Sir J. J. Thomson. Fifth 

 edition. Pp. viii+410. (Cambridge: At the Uni- 

 versity Press.) 30i. net. 



The Dynamical Theory of Gases. By Prof. J. H. 

 Jeans. Third edition. Pp. vii-l-442. (Cambridge : At 

 the University Press.) 30s. net. 



The Scientific Papers of Bertram Hopkinson. Col- 

 lected and arranged by Sir J. Alfred Ewing and Sir 

 Joseph Larmor. Pp. xxvii-(-48o-l-plates. (Cam- 

 bridge : .^t the University Press.) 635-. ' net. 



Handbuch der Anorganischen Chemie. Edited by 

 Prof. R. Abegg and Dr. Fr. Auerbach. Vierter Band. 

 Erste .-Vbteilung. Zweite Halfte. Pp. xiii-(-io72. 

 (Leipzig : S. Hirzel.) 140 marks. 



Agriculture and Irrigation in Continental and 

 Tropical Climates. By Kinsley D. Dovle. Pp. xv+ 

 268. (London : Constable and Co., Ltd.) 19,?. net. 



Instinct in Man : .\ Contribution to the Psychology 

 of Education. By Dr. J. Drever. Second' edition. 

 Pp. x-t-293. (Cambridge: At the University Press.) 

 lox. 6i. net. 



Proceedings of the Cambridge Philosophical Society. 

 Vol. XX., part 2. (Michaelmas Term, 1920.) Pp. 

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An Introduction to Bacterial Diseases of Plants. 

 By Erwin F. Smith. Pp. xxx-H688. (Philadelphia 

 and London : W. B. Saunders Co.) 50,?. net. 



Principles and Methods of Industrial Education. 

 By W. H. Dooley. Pp. xi+2S7. (London and 

 Sydney : G. G. Harrap and Co., Ltd.) f>s. net. 



Psyche's Lamp : A Revelation of Psychological 

 Principles as Foundation of all Thought. By Robert 

 Brififault. Pp. 240. (London : G. Allen and Unwin, 

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Studies in French Forestry. By Theodore S. 

 Woolsey, jun. Pp. xxvi-l-5so. (New'York : J. W'ilev 

 and Sons, Inc. ; London : Chapman and Hall, Ltd.) 

 364-. net. 



Ou en est I'Astronomie. By I'Abb^ Th. Moreux. 

 Pp. vi-l-295. (Paris: Gauthier-Villars et Cie.) 



Annuaire pour I'An 192 1 public par le Bureau des 

 Longitudes. Pp. viii-|-7io-|-A42-(-Bi7 + C69. (Paris: 

 Gauthier-Villars et Cie.) 8 francs net. 



Memoirs of the Connecticut Academy of Arts and 

 Sciences. Vol. vii. : The Appendages, Anatomy, and 

 Relationships of Trilobites. Bv Dr. Percy E. Ray- 

 mond. Pp. 169-f-xi plates. (New Haven, Conn. : 

 Yale University Press.) 6 dollars. 



.\ Research on the Eucalvpts, Especially in Regard 

 to their Essential Oils. By Richard T. Baker and 

 Henry G. Smith. Second edition. Pp. xv-l-47i-h 

 plates. (Sydney : Technological Museum.) 



NO. 2677, VOL. 106] 



Perspective : The Practice and Theory of Perspec- 

 tive as Applied to Pictures, with a Section dealing 

 with its Application to .Architecture. By Rex Vicat 

 Cole. Pp. viii+ 17-279. (London: Seeley, Service 

 and Co., Ltd.) i8x. net. 



.'\ Diplomat in Japan : The Inner History of the 

 Critical Years of Japan when the Ports were Opened 

 and the Monarchy Restored. By the Right Hon. Sir 

 Ernest Satow. Pp. 427. (London : Seeley, Service 

 and Co., Ltd.) 32s. net. 



The Copernicus of Antiquity (.Aristarchus of 

 Samos). By Sir Thomas Heath. (Pioneers of Pro- 

 gress : Men of Science.) Pp. iii + 59. (London : 

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 net. 



Early .\nnals of Ornithology. By J. H. Gurney. 

 Pp. viii-l-240. (London : H. F. and G. Witherby.) 

 12.?. 6d. net. 



Ministry of Finance, Egypt. Survey Department. 

 Meteorological Report for the Year 1913. Pp- xiv-h 

 240+xii. (Cairo : Government Press.) P.T. 30. 



Imperial Mineral Resources Bureau. The Mineral 

 Industry of the British Empire and Foreign Countries 

 (War Period). .Antimony (1913-19). Pp. 34. (Lon- 

 don : H.M. Stationery Office.) is. net. 



An Introduction to Technical Electricity. By S. G. 

 Starling. Pp. xii+i8i. (London: Macmillan and 

 Co., Ltd.) 3s. 6i. 



A Book of Gardening for the Sub-Tropics. By 

 Mary Stout and Madeline Agar. Pp. 200. (London : 

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Bergens Museums Aarbok, 1918-19. I Hefte. 

 Naturvidenskabelig Roekke. Pp. 76-I- 37+864- vii 

 plates. (Bergen.) 



An Account of the Crustacea of Norway. By G. O. 

 Sars. Vol. vii. : Copepoda. Supplement. Parts vii. 

 and viii. : Harpacticoida (continued). Pp. 73^-92 + 

 xlix-lxiv plates. (Bergen : Bergen Museum.) 



Diary of Societies. 



THURSDAY, Febhtjiet 17. 



RovAL IssTiTCTios OF GREAT BniTAiu, at 3.— Prof. W. A. Herdman : 

 Oceanography (The Sca-Fisherics). 



ROTAI, SociETl, at 4.30.— Dr. C. Chrcc ; A CompariBon of 

 Magnetic Declination Changes at British Ohservatories.— 

 Prof. H. M. Maedonald : The Transmission of Electric Waves 

 Around the Earth's Surface.— Prof. T. H. Havcloclc ; The Stability 

 of Fluid Motion.— Prof. W. H. Young : The Transformation of 

 Integrals.— J. L. Haughton and Kathleen E. Bingham : The 

 Constitution of the Alloys of Aluminium, Copper, and Zino 

 containing High Percentages of Zinc. 



UOTAL COM.EGE OF PHYSICIANS OF LONDON, at 5.— Dr. Martin Flack : 

 ResDiratory Efficiency in Relation to Health and Disease (Milroy 

 Lecture). ., ^, 



LiNNEAN SocTETT, at 5.— Prof. G. B. De Tom : A Contribution to 

 the Teratology of the Genus Datura.- Capt. ,T. Ramsbottom and 

 A. J. Wilmott: A Plant Collection from Macedonia.— Dr. 6. C. 

 Druce : Shetland Plantago and Other Plants from the Northern 



RoTAL SoOTETT OF MEDICINE (Dermatology Section), at 5. 



Rot At AKnoNArTTCAL Society fat Roval Society of Arts), at 5.30. — 

 F. Handley Page : The Handley Page Wing. . 



INSTITI'TION OF MINING AND METALErltOT fat Geological SooiPty), 

 at .'1.30.- E. H. Clifford : A Scheme for Worting the City Deep 

 Minn nt a Depth of 7000 ft. 



Institftion of FiECTRicAi. Enotneebs (at Institution of Civil 

 Engineers), at fi.— Prof. E. Wilson: Magnetic Susceptibility of 

 Low Order : I. Instrumentation. 



Instittttion of Automobile Enoineebs (London Graduates' Meet- 

 inc) (nt 28 Victoria Street), at 7.30.— E. L. Bass: Engine 

 Lubrication. 



Chemical Soctett. at 8. — L. J. Hudleston and H. Bassett : Equilibria 

 of Hvdroflunsilicic Acid. Part I. Mixtures of HydroflucRilieio 

 and Hydrofluoric Acids.^R. G. Farfher and H. King: Additive 

 Compo'tnds of Antipvrvlnminodiacetic Acid and its Salts with 

 Nentra] Salts. — H. Bassett and T. A. Simmons: The Svstem. 

 Picric Acid — Phenyl Aoridine. — F. S. Kipning : Orc-anio Deriva- 

 tives of Silicon. Part XXIY. rf^De^ivatives of Silicoetbanc. — 

 F. W. Atack ■ T>>e Structural Isomerism of OTiraes. Part T. 

 Criticism of the Hantisch-Werner Hypothesis of the Geometrio»l 



