Nature, "| 

 Octobet 7, 1920J 



Index 



xlix 



Martin (J.), A Geography of Asia, 35 



Miller (L. E.), In the Wilds of South America: Six 

 Years of Exploration in Colombia, Venezuela, British 

 Guiana, Peru, Bolivia, Argentina, Paraguay, and 

 Brazil, 159 



Savory (I.), The Romantic Roussillon : In the French 

 Pyrenees, 163 



Sykes (Miss Ella), and Brig.-Gen. Sir Percy Sykes, 

 Through Deserts and Oases of Central Asia, 330 



Vignaud (H.), The Columbian Tradition on the Dis- 

 covery of America and the Part played therein by the 

 Astronomer Toscanelli, 803 



Geology and Mineralogy: 



Bosworth (Dr. T. O.), Geology of the Mid-Continent Oil- 

 fields, Kansas, Oklahoma, and North Texas, 608 



Cahen (E.), and W. O. Wootton, The Mineralogy of the 

 Rarer Metals : A Handbook for Prospectors. Secona 

 edition, revised bv E. Cahen, 259 



Case (Prof. E. C), the Environment of Vertebrate Life in 

 the Late Paleozoic in North America : A Paleogeo- 

 graphic Study, 223 



Duly (S. J.), The Natural Wealth of Britain : Its Origin 

 and Exploitation, 579 



Marker (Dr. A.), Petrology for Students. Fifth edition, 99 



Moir (J. Reid.), Pre-Palaeolithic Man, 289 



Mathematical and Physical Science : 



Andrews (E. S.), Elements of Graphic Dynamics, 65 

 Angles (J. W.), Mensuration for Marine and Mechanical 

 Engineers (Second and First Class Board of Trade Ex- 

 aminations), 163 

 Ball (Dr. J.), Astrolabe Diagram, 329 

 Ball (Dr. J.), and H. K. Shaw, A Handbook of the 



Prismatic Astrolabe, 329 

 Blake (E.), Selected Studies in Elementary Physics : A 



Handbook for the Wireless Student and Amateur, 739 

 Borchardt (W. G.), School Mechanics. Part i., School 



Statics, 163 

 Boutroux (Prof. P.), Les Principes de I'Analyse Math^- 

 matique : Expose Historique et Critique. Tome 

 Second, 256 

 Claude et Driencourt, Description et Usage de I'Astro- 



labe ^ Prisme, 329 

 Comstock (Prof. G. C), The Summer Line or Line of 



Position as an Aid to Navigation, 5152 

 Coursey (P. R.), Telephony without Wires, 5 

 Cullis (Prof. C. E.), Matrices and Determinoids. Vol. 



ii., 191 

 Crowther (Dr. J. A.), Ions, Electrons, and Ionising Ra- 

 diations, 740 

 Davison (Dr. C), Differential Calculus for Colleges and 



Secondary Schools, 65 

 Dennis (T.), An Arithmetic for Preparatory Schools. 



With Answers. Second edition, 67 

 Downing (Prof. E. R.), A Field and Laboratory Guide in 



Physical Nature-study, 675 

 Dowsett (H. M.), Wireless "Telegraphy and Telephony : 



First Principles, Present Practice, and Testing, 483 

 Farmer (G. W.), A First Year Physics for Junior Tech- 

 nical Schools, 22Q 

 Ferraris' "Dioptric Instruments": Being an Elemen- 

 tary Exposition of Gauss' Theory and its Applications. 

 Translated by Dr. O. Faber from Prof. F. Lippich's 

 German Translation of Prof. G. Ferraris' Italian Work 

 entitled " The Fundamental Properties of Dioptric In- 

 struments," 542 

 Ferry (E. S.), and others, A Handbook of Physics 



Measurements. Two vols., 193 

 Fleming (Prof. J. A.), The Propagation of Electric Cur- 

 rents in Telephone and Telegraph Conductors. Third 

 edition, 611 

 Forsyth (Prof. A. R.), Solutions of the Examples in a 



Treatise on Differential Equations, 260 

 Fowler (R. H.), The Elementary Differential Geometry 



of Plane Curves, 321 

 Freundlich (E.). translated by H. L. Brose, The Founda- 

 tions of Einstein's Theory of Gravitation, 350 

 Hatton (Prof. J. L. S.), The Theory of the Imaginary in 



Geometry, together with the Trigonometry of the Ima- 

 ginary, 736 



Heath (Sir Thomas L.), Euclid in Greelc. Book 1. 

 With Introduction and Notes, 288 



Hutchinson (R. W.), Intermediate Text-book of Mag- 

 netism and Electricity, 515 



Jeans (J. H.), Problems of Cosmogony and Stellar Dy- 

 namics, 31 



Karpinski (Prof. L. C), Prof. H. Y. Benedict, and Prof. 

 J. W. Calhoun, Unified Mathematics, 162 



Kenyon (Prof. A. M.), and Prof. W. V. Lovitt, Mathe- 

 matics for Collegiate Students of Agriculture and 

 General Science. Revised edition, 131 



Lamb (C. G.), Notes on Magnetism, 193 



'Love (Prof. A. E. H.), A Treatise on the Mathematical 

 Theory of Elasticity. Third edition, 511 



Mackenzie (Col. J. S. F.), A Night Raid into Space, 100 



Martin (M. J.), Wireless Transmission of Photographs. 

 Second edition, 451 



Mayo (C. H. P.), Elementary Calculus (with Answers), 

 163 



Mercer (Rt. Rev. Dr. J. E.), Some Wonders of Matter, 

 67 



Milne (J.), The Analytical Geometry of the Straight 

 Line and the Circle, 65 



Preston (Prof. T.), The Theory of Heat. Third edi- 

 tion, edited by J. R. Cotter, 228 



Rose (W. N.), Mathematics for Engineers. P^rt ii., 260 



Schlick (Prof. M.), Rendered into English by H. L. 

 Brosfc, Space and Time in Contemporary Physics : 

 An Introduction to the Theory of Relativity and Gravi- 

 tation, 546 



Shore (A), Alternating Current Work, 133 



Silberstein (Dr. L.), Projective Vector Algebra : An Al- 

 gebra of Vectors Independent of the Axioms of Con- 

 gruence and of Parallels, 65 



Slate (Prof. F.), The Fundamental Equations of Dy- 

 namics and its main Co-ordinate Systems Vectorially 

 Treated and Illustrated from Rigid Dynamics, 65 



Tancock (E. O.), The Elements of Descriptive Astro- 

 nomy. Second edition, 131 



Taylor (W. T.), Calculation of Electric Conductors, 229 



Thomas (T.),- Revision Arithmetic Logarithms, Slide 

 Rule, Mensuration, Specific Gravity, and Density. 

 Second edition, 229 



Thompson (J. S. and H. G.), Silvanus Phillips Thomp- 

 son, D.Sc, LL.D., F.R.S., His Life and Letters, 448 



Thomson (Sir J. J.), traduit par Prof. M. C. Moureu, 

 La Th^orie Atomique, 36 



Triimpler (R.), Bestimmung fundamentaler Sternorter 

 aus Hohendurchgangsbeobachtungen, 329 



Tychonis Brahe Dani Opera Omnia. Edidit I. L. E. 



Dreyer. Tomus vi., 672 

 Whipple (Prof. G. C), Vital Statistics, 131 

 Whitehead (Prof. A. N.), An Enquiry concerning the 



Principles of Natural Knowledge, 446 

 Woltjer, jun. (Dr. J.), Investigations in the Theory of 



Hyperion, 675 

 X-rays, The Examination of Materials by. A General 

 Discussion held by the Faraday Society and the 

 Rontgen Society, Tuesday, .April '29, 1919, 132 



Medical Science : 



Avery (Margaret), A Text-book of Hygiene for Training 

 Colleges, 259 



Barjon (F.). translated by Dr. J. A. Honeij, Radio- 

 Diagnosis of Pleuro-Pulnionary Affections, 4 



Dixon (Prof. W. E.). Practical' Pharmacology, 420 



Edridge-Green (Dr. F. W.), The Physiol(^y of Vision, 

 with Special Reference to Colour Blindness ; Card Test 

 for Colour Blindness, 575 



Feldman (W. M.), The Principles of Ante-Natal and Post- 

 Natal Child Physiology : Pure and Applied, 638 



Gurney-Dix«n (Dr. S.), The Transmutation of Bacteria, 



Keith (Prof. A.), The Engines of the Human Body : 

 Being the substance of Christmas Lectures given at the 

 Roval Institution of Great Britain, Christmas, 1916- 

 1917. 195 



