xlvi 
Meteors: May, 682; in April, 441; of March 17, W. F. 
Denning, 479; Perseid, in July 1592, Dr. J. K. 
Fotheringham, 774; The January, 60 
Methyl: Alcohol, Pure, Non-poisonous, Dr. Theiler, 612 ; 
Sulphate: Action of, and of Potassium Methyl 
Sulphate on Monobasic Organic Acids in the Absence 
of Water, L. J. Simon, 451; The Methylating and 
Sulphonating Action of, on Phenols in the Absence of 
Water, L. J. Simon and M. Fréjacques, 554 
Methylene Blue, The Reduction of, by Iron Compounds, 
E. J. Morgan and J. H. Quastel, 653 
Methylisopyromucic Acid and a Method of Diagnosis of 
the Acids of the Sugar Group, L. J. Simon and A. J. A. 
Guillaumin, 35 
Metol, Innocuous, W. F. A. Ermen, 481 
Metric System, The American Association and the, 196 
Michelson-Morley Experiment, Reconsideration of the, Dr. 
A. Daniell, 475 
Microbic Transmissible Autolysis, Prof. J. Bordet, 339 
Microdrili, Glands of the, Dr. J. Stephenson, 61 
Micrometric Slide Rule, A, H. J. Denham, 103 
Microphonic Flames, Dr. Lee de Forest, 739 
Microscope: A New, R. and J. Beck, Ltd., 62 ; Applica- 
tions of the, in the Manufacture of Rubber, W. M. 
Ames, 794; Industrial Applications of the, Prof. F. J. 
Cheshire and others, 239; A. G. Lowndes, 358; in 
Paleobotanical Research, Use of the, Prof. A. C. 
Seward, 653 ; Lamp, An Electric, Ogilvy and Co., 96 ; 
Objectives, Focus Aperture Ratios of, E. M. Nelson, 236 
Microscopic Bodies, The Determination of pH of, C. F. A. 
Pantin, 81 
Microscopy : in the Examination of Manufactured Paper, 
S. R. Wycherley, 553; Modern, a Handbook for 
Beginners and Students, M. I. Cross and M. J. Cole. 
Fifth edition, revised and rearranged by H. F. Angus, 
207 
Military Mining, 663 
Milk: Characters, Variation and Inheritance of, T. 
Ellinger, 867; Fat, Comparative Values of Protein 
Fat, and Carbohydrate for the Production of, E. J. 
Sheehy, 654; Supply, Pure, The Science and Practice 
of, 105, 237 
Millibar in Aerodynamics, Use of the, Major A. R. Low, 535 
Millions Fish, Linked Characters in the, Dr. O Winge, 718 
Mimosa, Excitation in, The Conduction of, R. Snow, 237 
Mind: -body Problem, The Double-knowledge Approach 
to the, R. W. Sellars, 67; The Appearance of, J. C. 
M‘Kerrow, 770 
Minds, The Contact of, C. D. Burns, 794 
Mineral: Deposits in the Development of a Young 
Country, The Influence of, Dr. E. T. Mellor, 162; 
Fertilisers, L. Owen, 787 
Mineralisation of Histological Sections by Calcination, 
A. Policard, 655 
Minerals: and Rocks, Essentials for the Microscopical 
Determination of Rock-forming, Dr. A. Johannsen, 
Dr. J. W. Evans, 143; Concentration of, by Multi- 
phase Magnets, W. M. Mordey, 303; of Economic 
Importance and Metalliferous Mines in Ireland, 
Memoir and Map of Localities of, Prof. G. A. J. Cole, 
35 
Mine : Lighting in, E. Farmer, S. Adams, and A. 
Stephenson, 341; Safety in, Research Board, ap- 
pointment of additional members of the, 579 
Mining: and Metallurgy, Institution of, Awards of the, 
370; Industry of Canada, The, Dr. J. B. Tyrrell, 483 
Miocene Cichlid Fish from Haiti, Prof. T. D. A. Cockerell, 
858 
Mirage: A Remarkable, at Oban, A. Tarn, 440; at 
Cape Wrath, A Double-Vertical-Reflection, D, Brunt, 
222 
Mixed and Symmetrical 1-Ethanoic-1-Camphomethanoic 
Esters and their Saponification Products, The, A. 
Haller and L. Palfray, 727 
Modern Wireless, No. 1, 267 
Molecular: and Crystal Symmetry, T. V. Barker, 632; Dr. 
J. W. Evans, G. Shearer, and W. T. Astbury, 741 ; 
Oscillation, Selective Interruption of, A. Fairbourne, 
149; R. d’E. Atkinson, 326 
Molluscs of South India, The Common, J. Hornell, 12 
Molybdenum Ores, Dr. R. H. Rastall, 392 
Title Index 

Nature, 
August 11, 1923 
Molybdic Acid, Action of, on the Rotatory Power of the 
Tartaric and Malic Esters, E. Darmois, 691 
Mona Complex, Succession and Metamorphism in the, 
E. Greenly, 587 
Monads, Prof. Wildon Carr’s Theory’ of, Miss H. D. 
Oakeley, 486 ° 
Monochloracetic Acid, A New Method of Preparation of, 
L. J. Simon and G, Chavanne, 275 
Monocotyledons, Supposed Reserve Dextrins of, H. Colin 
and H. Belval, 832 
Monomethylaniline in the Production of Tetryl, The 
Utilisation of, T. J. Nolan and H. W. Clapham, 654 
Moon, Partial Eclipse of the, 301 ' 
Moon’s Motion, Irregularities in the, W. Child, 682 
Moonlight: Brightness of, Colour Temperature and, Dr. 
W. E. Forsythe, 533; Effect of, on the Germination 
Seeds, Elizabeth Sidney Semmens, 49 ; 
Moray Firth Coast, Photography of the, A. G. Ogilvie, 310 
Morbid Fears and Compulsions: their Psychology and 
Psychoanalytic Treatment, Dr. H. W. Frink, 250 
Mosquito Control, Impounding Water for, D. L. van Dine, 
374 
Motion: Definitions and Laws of, in the ‘ Principia,” 
Sir George Greenhill, 224; of a Fluid in the Field of 
Velocity produced by a Screw Propeller, the Differ- 
ential Equations of, Dr. E. Pistolesi, 887 
Motors, Testing, An Aerodynamical Arrangement for, P. 
Dumanois, 383 
Moulds, Toxicity of Copper with respect to, R. Dubois, 832 
Moulton, Lord, The Life of, H. Fletcher Moulton, 44 
Mueller Medaland Fund, Award of the, to J. H. Maiden, 406 
Museum: Building at South Kensington, 895; Exhibits, 
The Cleaning and Restoration of, Second Report, 
Dr. A. Scott, 314 ; Objects, The Circulation of, in the 
Provinces, 127 
Museums, Prof. T. D. A. Cockerell, 184 
Music: as a University Subject, Sir Henry Hadow, 722 ; 
Instruction in Colleges and High Schools of the U.S.A., 
Present Status of, 308 
Musical Acoustics based on the Pure Third System, 
T. Kornerup. Translated by Phyllis A. Petersen, 565 
Mycetozoa of Surrey, The Dates of Appearance and 
Habitats of the, P. J. Alexander, 553 
Mysore, Meteorology in, N. V. Iyengar, 303 
Naga Tribe of Assam, Monoliths of the, J. H. Hutton, 823 
Narrow Bands and Wide Bands in the Absorption Spectra 
of Bodies in Solution and in the State of Vapour, 
The Production of, V. Henri, 691 
Nasal Polypus, A Causal Organism of, Prof. J. H. Ash- 
worth, 719 
National: Acclimatisation Society of France, award of 
the large silver medal to Prof. A. Henry, 680; 
Health and Medical Research, 421 ; Museum of Wales, 
Report of the, for 1921-22, 440; Research Council of 
America, The, 31; Union of Scientific Workers: 
Annual Report of the, 157; Dame Helen Gwynne- 
Vaughan elected president of the, 92 
Native Question, Certain Aspects of the, Senator A. W. 
Roberts, 163 
Natural: Coloration, Researches on, effected at the Pic 
du Midi according to the experiments of J. Bourget, 
C. Dauzére, 103; Resistance and the Study of 
Normal Defence Mechanisms, Prof. J. C. G. Leding- 
ham, 85 
Naturalist’s Calendar, A, kept at Swaffham Bulbeck, 
Cambridgeshire, L. Blomefield. Second edition, 
edited by Sir Francis Darwin, 112 
Nature: Knowledge and Pastime, Sir Herbert Maxwell, 
800 ; Notes, Critical and Constructive, E. McLennan, 
508; Study and Phenology, J. E. Clark and I. D. 
Margary, 49; The Pageant of, British Wild Life and 
its Wonders, edited by Dr. P. Chalmers Mitchell. 
Parts I, 2, 3, 596 
Nebule: Gravitation and Light-Pressure in, Prof. F. A. 
Lindemann, 881; Photographic Studies of, J. C. 
Duncan, 857; Problems of the, Rev. H. Macpherson, 
441; 850 New, Dr. H. Shapley, 717; Hypothesis, 
The, and Modern Cosmogony: being the Halley 
Lecture delivered on May 23, 1922, Dr. J. H. Jeans, 662 
