April 21, 192 1] 



NATURE 



255 



British Museum (Natural History). British Antarc- 

 tic {Terra Nova) Expedition, 1910. Natural History 

 Report: Zoology. Vol. iii., No. 7, Crustacea. 

 Part v., Ostracoda. By R. W. Barney. Pp. 175-90. 

 4^. 6d. Vol. iii., No. 8, Crustacea. Part vi., 

 Tanaidacea and Isopoda. By Dr. W. M. Tattersall. 

 Pp. 191-258+xi plates. 2 15. Vol. vi.. No. i, Proto- 

 zoa. Part i., Parasitic Protozoa. By Dr. H. M. 

 Woodcock and Olive Lodge. Pp. 24+3 plates, gs. 

 (London : British Museum (Natural History).) 



Relativity, the Electron Theory, and Gravitation. 

 Bv E. Cunningham. (Monographs on Physics.) 

 Second edition. Pp. vii+148. (London: Longmans, 

 Green and Co.) los. 6d. net. 



A Text-book of Botany for Medical and Pharma- 

 ceutical Students. By Prof. J. Small. Pp. x + 68i. 

 (London : J. and A. Churchill.) 255. net. 



Chromium Ore. By W. G. Rumbold. (Imperial 

 Institute Monographs on Mineral Resources, with 

 Special Reference to the British Empire.) Pp. ix+58. 

 (London : J. Murray.) 3s. 6d. net. 



Freshwater Fishes and How to Identify Them. By 

 Dr. S. C. Johnson and W. B. Johnson. Pp. 64. 

 (London : The Epworth Press.) is. 9^. net. 



Ministry of Public Works, Egypt : Physical Depart- 

 ment. Meteorological Report for the Year 1915. Pp. 

 x+122. (Cairo: Government Press.) P.T.30. 



Department of Agriculture and Technical Instruc- 

 tion for Ireland : Fisheries Branch. Scientific Inves- 

 tigations, 1920. No. 2, Sponges of the Coasts of 

 Ireland. By Jane Stephens. II. : The Tetraxonida 

 (concluded). Pp. 75+vi plates. (Dublin and London : 

 H.M. Stationery Office.) 35. net. 



Studies in the History and Method of Science. 

 Edited by Charles Singer. Vol. ii. Pp. xxii-t-559+ 

 Iv plates. (Oxford : Clarendon Press.) 48s. net. 



Parallaxes of 260 Stars derived from Photographs 

 made at the Leander McCormick Observatory. By 

 Prof. S. A. Mitchell and others. Pp. v-l-695.' (New 

 York : Columbia L niversitv Press.) 



The British Freshwater Rhizopoda and Heliozoa. 

 Vol. v., Heliozoa. By G. H. Wailes. Pp. xi+72 + 

 plates Ixiv-lxxiv. (London : Ray Society.) 



A Handbook on Cotton and Tobacco Cultivation in 

 Nyasaland. A Guide to Prospective Settlers. By 

 J. Stewart J. McCali. Pp. 85. (Zomba : Govern- 

 ment Printer.) 



British Museum (Natural History). No. 7, Report 

 on Cetacea Stranded on the British Coasts during 

 1919 and T920. By Sir S. F. Harmer. Pp. 18. 

 (London : British Museum (Natural History).) 4s. 



Primitive Society : The Beginnings of the Family 

 and the Reckoning of Descent. By Dr. Edwin S. 

 Hartland. Pp. v+i8o. (London: Methuen and Co., 

 Ltd.) 6s. net. 



Electrical Engineering. By Dr. T. F. Wall. Pp. 

 xi+491. (London : Methuen and Co., Ltd.) 21s. 



Vocational Chemistry for Students of Agriculture 

 and Home Economics. By Prof. John J. Willaman. 

 (Farm Life Text Series.) Pp. ix+2q4. (Phila- 

 delphia and London : J. B. Lippincott Co.) 85. 6d. 

 net. 



Agricultural Economics. By Prof. James E. Boyle. 

 (College Texts : Agriculture.) Pp. ix-f 448. (Phila- 

 delphia, Chicago, and London : J. B. Lippincott Co.) 

 I2S. 6d. net. 



Ministry of Munitions and Department of Scientific 

 and Industrial Research. Technical Records of Ex- 

 plosives Supply. iqi.^-iS. No. I. Recovery of Sul- 

 phuric and Nitric Acids from Acids used in the Manu- 

 NO. 2686, VOL. 107] 



facture of Explosives : Denitration and Absorption. 

 Pp. viii-t-56. (London : H.M. Stationery Office.) 

 12s. 6d. net. 



The Dynamics of the Airplane. By Prof. Kenneth 

 P. Williams. (Mathematical Monographs, No. 21.) 

 Pp. viii-fi38. (New York: J. Wiley and Sons, Inc.; 

 London : Chapman and Hall, Ltd.) 13s. 6d. net. 



The Elements of Theoretical and Descriptive Astro- 

 nomy. Bv Charles J. White. Eighth edition, revised 

 by Paul P. Blackburn. Pp. xi+309+ix plates. (New 

 York : J. Wiley and Sons, Inc. ; London : Chapman 

 and Hall, Ltd.) 17s. 6d. net. 



Handbuch der Pharm.akognosie. By A. Tschirch. 

 Band III., Lieferung i. Pp. 64-l-i plate. (Leipzig: 

 C. H. Tauchnitz.) 10 marks. 



The Story Book of the Fields. By J. H. Fabre. 

 Pp. 271. (London : Hodder and Stoughton, Ltd.) 

 Ss. 6d. net. 



The Tin Resources of the British Empire. By 

 N. M. Penzer. (The Raw Materials of Industry.) 

 Pp. x-f-358. (London : W. Rider and Son, Ltd.) 

 155. net. 



An Introduction to the Psychological Problems of 

 Industry. By Frank Watts. ' Pp. 240. (London : G. 

 Allen and Unwin, Ltd.) 125. 6d. net. 



University of London : Galton Laboratory for 

 National Eugenics. Eugenics Lecture Series, xiii. : 

 Side Lights on the Evolution of Man. By Karl Pear- 

 son. Pp. 27+vii plates. (London : Cambridge Uni- 

 versity Press.) 35, net. 



Kritische Bemerkungen zu den Grundlagen der 

 Relativitatstheorie. By Prof. H. Dingier. Pp. 29. 

 (Leipzig : S. Hirzel.) 3 marks. 



Diary of Societies. 



THURSDAY, Apeil 21. 



RoiAL IxsTiTiTiON OF Gekat Beitain. at 3.— Prof. H. S. Foxwell: 

 Nationalisation and Bureaucracy. 



RoiAL SociF.ir, at 4.30.— Prof. J. Joly : A Quantum Theory 

 of Colour Vision.— Prof . A. V. Hill : The Energy in- 

 volved in the Electric Change in Muscle and Nerve. — H. M. 

 Kyle : The Asymmetry, Metamorphosis, and Origin of Flat 

 Fishes. — T. L. Prankerd": Studies in the Cytology of the Statolith 

 Apparatus in Plants, viewed in Itelation to their Habit and 

 Biological Requirements. 



Royal society or Medicine (Dermatology Section), at 5. 



LiNSEAN Society, at 5.— Prof. Iv. Newstead : Some Observations on 

 the Natural History of the Upper Shiri River, Nyasaland. 



London M.athematical Society (at Royal Astronomical Society), at 

 5. — L. J. Mordell : Note on Papers by Mr. Darling and Prof. 

 Rogers. — Pandit Oudh Upadhyaya : (1) Cyclotomic Quinqueseotion; 

 (2) A Generalisation of a Theorem of Booth. — C. Krishnama- 

 chary and M. Bhimasena Rao : Properties of Eulerian and 

 Prepared Bernoullian Numbers. 



Institution of Mining and METALLrsGY (Annual General Meeting) 

 (at Geological Society), at. 5.30. — F. W. Harbord : Presidential 

 Address. 



Child-Study Society (at Royal Sanitary Institute), at 6. — Dr. 

 J. E. Borland : The Musical Training of Children. 



The Chemical Society, at 8. — F. Challenger and C. F. Allpress : 

 Organo-derivatives of Bismuth. Part iv. : The Interaction of 

 the Halogen Derivatives of Tertiary Aromatic Bismuth ines with 

 Organo-derivatives of Magnesium and Mercury. — J. A. N. Friend : 

 A Colloid Theory of the Corrosion and Passivity of Iron and 

 of the Oxidation of Ferrous Salts. — G. T. Morgan and J. D. 

 Smith : Researches on Co-ordination and Residual ASSnity. 

 Part iv. : The Constitution of Simple and Complex Cobaltic 

 Quinoneoxime Lates. — G. T. Morgan and H. Burgess : Non- 

 aromatic Diazonium Salts. Part vi. : 3 : 5-DimethyIf«ooxa«ole-4- 

 diazoniiim Salts and their .\zo-derivativps. — R. de B. Barnett and 

 J. ^V. Cook : Studies in the Anthracene Series. Part i.— J. B. 

 Firth : Some Factors governing the Sorptive Capacity of Char- 

 coal. Sorption of Ammonia bv Coconut Charcoal. — N. V. Sidg- 

 wick and E. K. Ewbank : The Influence of Position on the 

 Solubilities of the Substituted Benzoic Acids.— N. V. Sidgwick 

 and W. M. Aldous : Influence of Position on the Solubility and 

 "foln+ilitv of the Afono- and Di-nitronhenols — N. T. Sidsrwiok and 

 TT. E. Rnbie : The Solnbility and Tolatility of the Chloro- and 

 Nitro-anilines and their Acetyl Derivatives. — G. A. R. Kon : The 

 Formation and Stability of «7))ro-Compounds. Part iv. : The 

 Formation of Ketonos derived from Onen-chain and Cvclio Glu- 

 tario Acids bv the Thermal Decomposition of their Calcium Salts. 

 — TT. .T. Jenkins : Interaction of Acetvlene and ifercurio Chloride. 



