Index 



Diptera Danica : Genera and Species of Flies hitherto 



found in Denmark. W. Lundbeck. Part vi. Pipun- 



culidae and Phoridae, 602 ; Researches on, Dr. A. E. 



Cameron ; Major W. S. Patton ; F. W. Edwards, 396 

 Dirigible Balloons, Experiments on the Guidance of, 



through Fog by the Method of W. A Loth, E. 



Fournier, 863 

 Discours et melanges, Prof. E. Picard, 629 

 Dominance Ratio, The, R. A. Fisher, 100 

 Donders, F. C, Reden gehalten bei der Enthullung 



seines Denkmals in Utrecht, am 22 Juni 1921, Prof. 



C. A. Pekelharing and others, 147 

 " Donneurs de sang," The, in Veterinary Medicine, L. 



Panisset and J. Verge, 136 

 Drahtloser Ubersee-Verkehr, Dr. G. Eichhorn, 374 

 Drainage of Agricultural Land, Proposed Scheme for the, 



426 

 Draper Gold Medal of the National Academy of Sciences 



of the U.S.A. presented to Prof. H. N. Russell, 820 

 Drone-Fly, Attack on a, by a Wasp, Major E. E. Austen, 323 

 Drought of 1921, The, C. E. P. Brooks and J. Glasspoole, 



55 

 Drugs in Commerce : Their Source, Preparation for the 



Market, and Description, J. Humphrey, 7 

 Duree et Simultaneity : Apropos de la theorie d'Einstein, 



H. Bergson, 503 

 Durham : University Calendar, 530 ; Philosophical Society, 



Election of Officers of the, 784 

 Dust-raising Winds, Dr. C. W. B. Normand, 262 

 Dutch Zoological Society, The Fiftieth Anniversary of the, 



Prof. J. F. van Bemmelen, 589 

 Dye Industry, The French, 164 



Earth : Currents in France, Dr. A. Nodon, 888 ; Evolution 

 and its Facial Expression, Prof. W. H. Hobbs, 270 ; 

 The Primitive Crust of the, Prof. G. A. J. Cole, 249 ; 

 J. Parkinson, 413 



Earthquake : Foci, The Variable Depth of, Dr. Dorothy 

 Wrinch and Dr. H. Jeffreys, 310 ; in the Midland 

 Counties, 393 ; of August 7, 1895, in Northern Italy, 

 R. D. Oldham, 757 ; Waves, The Propagation of, Dr. 

 J. H. Jeans, 794 



Earthquakes : Focal Depths of, Prof. H. H. Turner, 55 ; 

 in the Region around Tokyo, Prof. Omori, 162 



Earth's Crust : Chemical Composition of the, Prof. W. 

 Vernadsky, 229 ; The, and its Composition, T. Crook, 

 253 ; The Oldest-known Rocks of the, Prof. G. A. J. 

 Cole, 39 



Earth's Structure, The, and its Evolution, 270 



Earthworks in America, C. C. Willoughby, 585 



East : Africa, Twenty-five Years in. Rev. John Roscoe, 36 ; 

 Anglian Institute of Agriculture, H. M. McCreath 

 elected Principal of the, 530 



Eastman Kodak Company, Research Laboratory of the, 

 Abridged Scientific Publications from the, Vol. 4, 644 



Eaux souterraines, Nouveau Traite des, E.-A. Martel, 242 



Echinoderm Larvae and their Bearing on Classification, 

 Prof. H. Mortensen, 806 



Echinus : esculentus, Habits of, R. Elmhirst, 667 ; miliaris, 

 the lantern of Aristotle in, The Development of the 

 Calcareous Parts of, D. W. Devanesen, 26 



Echtfarbung der Zellkerne, Untersuchungen fiber, mit 

 kiinstlichen Beizenfarbstoffen und die Theorie des 

 histologischen Farbeprozesses mit gelosten Lacken, 

 Prof. S. Becher, 33 



Ecological Investigation, The Methods of, Dr. E. J. 

 Salisbury, 208 



Edaphon : Das, Untersuchungen zur Okologie der boden- 

 bewohnenden Mikroorganismen, Dr. R. H. France. 

 Zweite Auflage, 206 



Edinburgh : and East of Scotland College of Agriculture, 

 Calendar of the, 621 ; Royal Society of, Election of 

 Officers and Council of the, 612 ; University, J. A. S. 

 Watson appointed Professor of Agriculture and 

 Rural Economy ; Conferment of Degrees, 133 ; Con- 

 ferment of Honorary Degrees ; Dr. E. M. Wedderburn 

 appointed Professor of Conveyancing, 198 ; C. G. 

 Darwin appointed Tait Professor of Natural Philo- 

 sophy, 720 



Education : How to Measure in, Prof. W. A. McCall, 601 ; 

 Psycho-analysis and, Dr. C. W. Kimmins and others, 

 650 ; Research and Invention, Prof. H. S. Hele- 

 Shaw, 715 ; The Board of Technical Institutions and, 



657 



Educational and School Science, Sir Richard Gregory, 420 



Eel : the Blood of the, The Variation of the Osmotic Pressure 

 of, as a Function of Modifications of the Salinity of the 

 External Medium, P. Portier and M. Duval, 332 ; The 

 Life History of the, Dr. Johs. Schmidt, 716 ; the 

 " Wiped," Osmotic Pressure of the Blood of, on a 

 Function of Modifications of the Salinity of the 

 External Medium, P. Portier and M. Duval, 864 



Efficiency of Man, The, and the Factors which influence it. 

 Prof. E. P. Cathcart, 354, 453 



Egg, the Germinal Localisations of the, The Properties of, 

 A. Brachet, 622 



Ego : The Beloved, Foundations of the New Study of the 

 Psyche, Dr. W. Stekel. Translated by R. Gabler, 805 



Egypt, Excavations in, Lord Carnarvon and H. Carter ; 

 Sir E. Wallis Budge, 783 ; Science in, Col. H. G. 

 Lyons, 283 



Einstein : Bergson and, Prof. H. Wildon Carr, 503 ; Pour 

 comprendre, l'Abbe Th. Moreux, 568 



Einstein'schen Relativitatstheorie : Die Grundlagen der, 

 eine kritische Untersuchung, Prof. H. Strasser, 568 



Einstein's: Paradox, Rev. H. C. Browne, 668; Prof. H. 

 Wildon Carr, 669 ; Theories, H. Reichenbach and 

 others, 398 



" Electrets," the Analogues of Magnets, M. Sato, 714 



Electric : Atoms, A Type of Ideal, J. L., 873 ; Conduction 

 in Metals, An Electron Theory of, E. H. Hall, 687 ; 

 Discharge in Gases at Low Pressures, The Minimum 

 Potential of, E. Dubois, 831 ; Power Systems, W. T. 

 Taylor, 506 ; Power, The Control of, 373 ; Traction, 

 Railway, F. W. Carter, 338 



Electrical : Analogue of the Vocal Organs, An, J. Q. 

 Stewart, 311 ; Condenser, A New Type of, Dr. T. F. 

 Wall, 810 ; 885 ; Engineering Principles of, Prof. 

 W. H. Timbie and Prof. V. Bush, 506 ; Engineers, 

 Institution of, Dr. J. A. Fleming elected an Honorary 

 Member of the, 745 ; Furnace, An, with Molyb- 

 denum Resistance in vacuo, P. Fleury, 795 ; Review, 

 Jubilee of the, 709 ; Theory, Modern, Supplementary 

 Chapters — Chapter xv. : Series Spectra, Dr. N. R. 

 Campbell, 767 



Electricite atmospherique, B. Chauveau. Premier Fasc. : 

 Introduction historique, 406 



Electricite generale, Problemes et exercises d'. Prof. P. 

 Janet, 147 



Electricity, S. G. Starling, 176 ; and Matter, Sir Ernest 

 Rutherford, 182 ; Applied, 595 ; Pure and Applied, 

 474 ; Technical, 506 ; Technical, H. T. Davidge and 

 R. W. Hutchinson. Fourth edition, 840 



Electrified Conducting Layers, The Resistance of Thin, 

 H. A. Perkins, 436 



Electrochemical Effects produced by superimposing 

 Alternating Currents upon Direct Currents, W. R. 

 Cooper, 135 



Electrode Potential Drop, Measurements of, with Direct 

 Current and Alternating Current Electrolysis, S. Marsh 

 and A. E. Evans, 722 



Electrodynamics : An Introduction to, from the Stand- 

 ■ point of the Electron Theory, Prof. L. Page, 509 



Electrolytes in the Blood, Condition of, B. S. Neuhausen, 8 



Electrometer : A New, with Rigid Pointer designed for 

 the Measurement of Radiations, B. Szilard, 136 ; An 

 Absolute Plane-cylinder, L. Bouchet, 831 



Electron, Positive, Speculation concerning the, Sir Oliver 

 Lodge, 696 



Electrons emitted from a Hot Tungsten Filament, The 

 Kinetic Energy of, J. H. Jones, 722 



Electrotherapy and Diagnosis, An Essay on the History 

 of, Dr. H. A. Colwefl, 32 



Elektrizitat und des Magnetismus. Einfiihrung in die 

 Theorie der, Zum Gebrauch bei Vortragen, sowie zum 

 Selbstunterricht, Prof. Max Planck, 474 



Elektrotechnik, Lehrbuch der, Dr. E. Blattner. Erster 

 Tiil. Vierte Auflage, 176 



Elettrotecnica elementare con numerosi problemi. A. 

 Occhialina. Vol. 1, 474 



