672 



NATURE 



[July 21, 192 1 



ancient sastras.— N. A. Yajnik and H. C. Mahajan : 

 HvdroKsis of some Indian oils by vegetable lipase. 

 The following oils were tried : (i) Linseed oil, (2) 

 soapnut oil (from the seeds of Sapitidus trifoliatus), 

 {3) sukh-chain oil (from the seeds of Pongamia 

 glabra), (4) neem oil (from the seeds of Melia azadi- 

 rachta), and (5) sesamum oil. Of these sukh-chain 

 oil and soapnut oil were not pressed so far from their 

 seeds, but were specially extracted for the purpose of 

 investigation, and they were found to be of particular 

 interest on account of the extent to which they can 

 easily be hydrolysed. 



Books Received. 



Air Ministry : Meteorological Office. Professional 

 Notes No. 18. Lizard Balloons for Signalling the 

 Ratio of Pressure to Temperature. By L. F. Richard- 

 son. (M.O. 24oh.) Pp. 73-93. (London : H.M. 

 Stationery Office.) 15. net. 



Memoirs of the Geological Survey : England and 

 Wales. A Short Account of the Geology of the Isle 

 of Wight. Bv H. J. Osborne White. Pp. v+219. 

 (London : E. Stanford, Ltd. ; Southampton : Ordnance 

 Survey Office.) jos. net. 



Die Prinzipien der Phvsikalischen Optik. By Ernst 

 Mach. Pp. X-K444. (Leipzig : J. A. Barth.) 48 

 marks. 



An Elementarv Handbook of Commercial Geo- 

 graphy. By J. W. T. Harris. Pp. 32. (Edinburgh : 

 W. and A. K. Johnston, Ltd. ; London : Macmillan 

 and Co., Ltd.) lod. 



^ A Treatise on the Integral Calculus, with Applica- 

 tions, Examples, and Problems. Bv ]. Edwards. 

 Vol. i. Pp. xxi+907. (London : Macmillan and Co., 

 Ltd.) 505. net. 



Optical Theories. Based on Lectures delivered 

 before the Calcutta Universitv bv Prof. D. N. Mallik. 

 Second edition, revised. Pp.' vii+202. (Cambridge : 

 At the University Press.) 165. net. 



Bureau of Education, India. Indian Education in 

 1919-20. Pp. iii+89+ 18 plates. (Calcutta: Govern- 

 ment Printing Office.) 2.2 rupees. 



Icones Plantarum Formosanarum. Bv Bunzo 

 Hayata. Vol. x. Pp. iv+335. (Taihoku : Bureau of 

 Productive Industries.) 



New Alt-Azimuth Tables, 65° N. to 65° S. Pp. 

 xvii+154. (Tokyo: Hydrograjjhic Department.) 



M^canismes Communs aux Phenomenes Disparates. 

 By Prof. M. Petrovitch. (Nouvelle Collection scien- 

 tifique.) Pp. v+279. (Paris : F. Alcan.) 8 francs. 



Botanical Memoirs. No. 4 : Elementarv Notes on 

 Structural Botany. By A. H. Church. Pp. 27. 2s. 

 net. No. 5 : Elementarv Notes on the Reproduction 

 of Angiosperms. By A. H. Church. Pp. 24. 2s. 

 net. No. 6 : On the Interpretation of Phenomena of 

 Phyllotaxis. Bv A. H. Church. " Pp. 58+xvi plates. 

 35. 6d. net. No. 7 : Elementarv Notes on the Morpho- 

 logy of Fungi. By A. H. Church. Pp. 29. 2^. net. 

 No. 8: Elementary Notes on Conifers. Bv A. H. 

 Church. Pp. 32. 25. net. No. 9 : Form^ Factors 

 m Coniferae^ By A. H. Church. Pp. 28. 25. net. 

 (London : O'xford University Press.) 



Field Mapping for the Oil Geologist. Bv C. A. 

 Warner. Pp. x+ 145. (New York : J. Wilev and 

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

 135. 6d. net. 



Elements of Engineering Geologv. Bv Prof. H. 

 Ries and Prof. T. L. Watson. Ppv v+365. (New 



NO. 2699, VOL. 107] 



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

 and Hall, Ltd.) 22s. net. 



Lichens. By A. L. Smith. (Cambridge Botanical 

 Handbooks.) Pp. xxviii+464. (Cambridge : At the 

 University Press.) 555. net. 



The Theory of the Induction Coil. Bv Prof, E. 

 Taylor-Jones. Pp. xi+217. (London : Sir' I. Pitman 

 and Sons, Ltd.) 12s. 6d. net. 



A New System of Scientific Procedure : Being an 

 Attempt to Ascertain, Develop, and Systematise the 

 General Methods Employed in Modern Enquiries at 

 their Best. Bv G, Spiller. Pp. ix+441. (London : 

 Chatto and Windus.) 105. 6d. net. 



Diary of Societies. 



THURSDAY, Jutx 21. 

 Incobpobated Municipal Electbical Association (at Institution of 

 Electrical Engineers), at 10 a.m.— D. Wilson : Steam Raising : 

 Yesterday, To-Day, and To Morrow.— W. H. Miles : • Modern Boiler 

 House Practice. — At 2.30. — E. Cross : Present-Day and Commercial 

 Problems in Electricity Supply. 



FRIDAY, Jvm 22. 



Incobpobated Municipal Electbical Association (at Institution of 



Electrical Engineers), at 10.15 a.m. — Annual General Meeting. 



MONDAY, JvLi 25. 



RoTAL SociETT OF MEDICINE, at 5.30.— Dr. M. Diamond : Some New 

 Phases of Old Problems in Dental Reconstruction. 



CONTENTS. PAGE 



The Tuberculosis Problem 641 



The Foundations of Physics. By Dr. E, N. da C. 



Andrade 643 



Mind and Brain 644 



Mineralogy for Students. By Dr. John W. Evans, 



F.R.S . 646 



Our Bookshelf 647 



Letters to the Editor: — 



Radiation from the Carbon Arc. ( I'Vi/A Diagram. ) — 



Dr. H. H. Plaskett 648 



The Discovery of Large Quartzite Implements of 

 Rostro-carinate and Early Palaeolithic Types in 



Uganda, (illustrared.)—}. Reid Moir . 649 

 Measuring with High Powers of the Microscope. — 



Dr. Geo. P. Bidder 650 



Ocean Tides.— Dr. W. Bell Dawson 651 



American and British Superannuation Systems. — 



W. Palin Elderton, C.B.E 651 



Cup and Ring Markings. (iniistrated.) — George 



Abbott 652 



A New Acoustical Phenomenon. — F. M. West . 652 



Magnetism and Atomic Structure. — Dr. A. E. Oxley 652 



An Algebraical Identity.— W. E. H. Berwick . . . 652 

 The Air and its Ways. By Sir Napier Shaw, 



F.R.S . 653 



Congress of the Universities of the Empire . . . 655 

 Gold Medal of the Royal Society of Medicine. 



{Illustrated) 657 



Obituary : — 



Henry Rondel Le Sueur. By A. C. ..... 658 



Notes .... 659 



Our Astronomical Column : — 



Aurorne at a Heioht of 500 km 663 



The Minor Planet Eros 663 



Jupiter's Four Great Satellites 663 



Quality of Protein in Nutrition. {With Diagrams.) 



By Dr. R. H. A. Plimmer 664 



The Cawthron Institute, Nelson, N.Z 668 



Institute of Historical Research in London . . . 668 



University and Educational Intelligence . ... 669 



Calendar of Scientific Pioneers 670 



Societies and Academies 670 



Books Received 672 



Diary of Societies 672 



