Nature, ] 
October 7, 1915 
Lndex 
XXVIl 

K. Hirayama and S. Ogura, 218; Forest Trees and 
Timber Supply, N. Shaw, 555; Medical Schools and 
Hospitals, Inspection of, 678; Tours, Two, 90 
Chir Pine, Twisted Fibres of the, F. Channing, 435 
Chlorophyll, Action of Light upon, H. Wager, 26; Func- 
tions of, Dr. A. J. Ewart, 25; the Réle of, P. Maze, 
473 
Cholera Bacillus, Vaccination against, H. Vincent, 140 
Chromosomes and Sex Determination in Abraxas grossu- 
lariata, the Relation between, Dr. L. Doncaster, 395 
Chromospheric Spectrum without an Eclipse, W. S. Adams 
and C, G. Burwell, 185 
Cicer arietinum, Acid Secreted by, D. L. Sahasrabuddhe, 
435 
Pitation of Asterids, Dr. J. F. Gemmill, 55 
Cinchona, the Laboratory and Garden at, 
Johnson, 516 
Cincinnati University Medical College, Gifts to, 636 
Citizen Soldiery, Major-Genl. L. Wood, 527 
City and Guilds of London Institute, Programme for 1915-16 
of the Department of Technology, 636; Report for 
1914, 551; Sir P. Magnus and, 109 
Civil Service Estimates, 237, 248 
Clackmannan and Kinross, the Counties of, J. P. Day, 145 
Clare Island, a Biological Survey of, Sections i., ii., iii., 
483 
Clark Reservation, the, Dr. J. M. Clarke, 155 
Cloud-forms at Helwan, the Frequency of, N. A. Comisso- 
pulos, 352 
Coal Distillation, the Products of, W. J. A. Butterfield, 
541 
Coat-colour in Animals, H. Onslow, 223 
Cobalt and Cobalt Alloys, H. T. Kalmus and C. Harper, 
Profs Days: 
240 
Coccidz of South Africa, the, C. K. Brain, 554 
Coccidia and Gregarines, the Chromosome Cycle in, 
C. Dobell and A. P. Jameson, 446 
Coco-nuts, Germination of, 183 
Coke, Ash of, Effect of Methods of Crushing on, F. A. 
Eastaugh, 363 : 
College, the, and the Factory, Dr. M. O. Forster, 573 
Colloid Chemistry, 504 
Colloidal Gold, the Mode of Action of, H. Busquet, 502 
Colombo Museum, Memoirs of the, Series A., No. 1, 
Bronzes from Ceylon, Dr. A. K. Coomarsawamy, 144 
Colour : Photography, a New Method of, 43; Sensation, Dr. 
J. Aitken, 673; Vision, an Introduction to the Study of, 
Dr. J. H. Parsons, 169 
Coloured Glass of the Middle Ages, the, G. Chesneau, 335 
Colours, Manufacture of, 41 
Columbia: Great Plateau of the, Exploration of the, 
Brigadier-Genl. T. E. Wilcox, 545; University, Gifts 
to, 278 
Combination Tones, Theories regarding the Origin of, 
Prof. W. B. Morton and Miss M. Darragh, 334 
Comet Notes, 99, 217 
Comets, the Origin of, Prof. E. Stromgren and J. Braae, 
493 
Commutative Law for Homogeneous Strains, F. L. Hitch- 
cock, 529 
Competitions in Connection with the Utilisation and 
Denaturing of Spirit or Alcohol for Industrial Pur- 
poses, 689 
Complex Variable, Functions of a, Prof. J. Pierpont, 254 
Conchological Society, Address to Mr. J. W. Taylor, 213 
Condensation Nuclei Produced in Gases by Ultra-violet 
Light, Miss M. Saltmarsh, 335 
Condensers, the Charge of, L. Bouthillon, sor 
Congress, Report of the Librarian of, 445 
Connecticut ; Agricultural College, Dr. E. W. Sinnott ap- 
pointed Professor of Botany and Genetics at the, 693; 
State Geological and Natural History, Report, 98 
Constantes Physiques, Recueil de, Profs. H. Abraham and 
P. Sacerdote, 281 
Constellations, the, G. Bigourdan, 218 
Consultative Council in Chemistry, a, 523, 623 
Control of the Forces of Nature, A. L. Lowell, 527 
Coolidge Tube, Use of the, M. M. Belot and M. Ménard, 
195 
Cooling in the Deep Parts of the Earth’s Crust, the 
Extreme Slowness of, J. Boussinesq, 501 

Co-operation of Scientific Workers, Mr. Lloyd George on 
the, 514 
Copepods, Parasitic, in Australia, J. Searle, 270 
Copper Spraying Fluids, M. Fonzes-Diacon, 251 
Coral Reefs, Shaler Memorial Study of, Prof. W. M. Davis, 
189 
Cordaitean Wood from the Indiana Black Shale, G. R. 
Wieland and M. G. Elkins, 354 
Corona, Spectrum of the Inner, Dr. R. Furuhjelm, 353 
Correlation-ratio, the Partial, Prof. Karl Pearson, 500 
CORRESPONDENCE 
Anhydrous Solids, The Preparation of, W. R. G. 
118 
Animal Figures, More Early, Dr. C. R. Eastman, 589 
Amplitudes in a Fourier Series obtained from a given set 
of Observations, The Probable Error of the, W. H. 
Dines, 644 
Antiseptic Action, Differential, of Organic Dyes, Dr. C. H. 
Browning, 90 
Aurora, The Great, of June 16, 1915, Prof. E. E. Barnard, 
536; 703 
Bird Migration, E. Wildin.. 508 
Butter, Modern Substitutes for, S. H. B., 372; The Writer 
of the Article, 373 
Butterfly, A Mistaken, Prof. E. E. Barnard, 174; Dr. 
H. ©. Forbes, 204; Prof. G. H. Bryan, 231; E. A. 
Martin, 318 
Cancer Problem, The and Radio-activity, Dr. H. C. Ross, 
617; Prof. J. Joly, 618 
Cavities due to Pyrites 
Abbott, 395 
Cement for Polarimeter Tubes, Dr. T. S. Patterson, 590 
Chemicals, The Prices of, J. J., 36 
Chemistry and Industry, J. E. Pollak, 34 
Chromosomes and Sex Determination in “Abraxas Gros- 
sulariata,” The Relation Between, Dr. L. Doncaster, 395 
Colour Sensation, Dr. J. Aitken, 673 
Cotton, The Use of, for the Production of Explosives, 
W. Lawrence Balls, 535; The Writer of the Article, 535 
Earth, The Age of the, Dr. F. A. Lindemann, 203, 372; 
C. E. Stromeyer, 259 
Electrons in Atoms, The Distribution of the, A. H. Comp- 
ton, 343; Prof. W. H. Bragg, 344 
Eryonicus-Polycheles, O. Sund, 372 
Extinguishing Fires, C. Carus-Wilson, 452 
Femora, Measurements of Medizval English, Dr. F. G. 
Parsons, 35; Prof. Karl Pearson, 66 
Fishes, A Bibliography of, Prof. Bashford Dean, 318 
Food Supply, Science and, A. Graham Bell, 618 
Foreign Philosophers, H. Richardson, 703 
French Magnanimity, G. D. Knox, 703 
Galileo and the Principle of Similitude, Prof. D’Arcy W. 
Thompson, 426 
Gas Ions, The Nature of, Prof. E. M. Wellisch, 230 
Green Flash, The, Prof. A. Schuster, 8; C. T. Whitmell, 
35; Prof. W. G. Duffield, 66; J. Evershed, 286 
“Green Fluorescence,” The, of X-Ray Tubes, Prof. H. 
Jackson, 479 
“Green Ray,” The, at Sunset, T. B. Blaithwayt, 204 
Hailstones, Structure of, S. L. Elborne, 591 
Halphen’s “Fonctions Elliptiques,” A Misprint in, Dr. G. B. 
Mathews, 90 
Harmonic Analysis, Dr. A. Russell, 204 
Hormones and Heredity, J. T. Cunningham; J. A. T., 8 
Ions in the Air, The Larger, Prof. J. A. Pollock, 286 
Isotopes, The Physical Properties of, Dr. F. A. Lindemann, 
7; A. C. Egerton, 90 
Magnetic Storm of June 17, The, and Aurora, Dr. C. 
Chree, 561 
Magnetic Storm, The, and Solar Disturbance of June 17, 
1915, Rev. A. L. Cortie, 450, 537, 618; Dr. C. Chree, 
480; A. A. Buss, 589 
Atkins, 
in Magnesium Limestone, G. 
| Magnetite and the Spinels, The Structure of, Prof. W. H. 
Bragg, 561 
Man’s True Thermal Environment, Dr. J. R. Milne, 260, 
508; G. W. Grabham, 451 
Mathematical Paradox, A, A. S. E., 345 [see also 403] 
Mellish’s Comet, Photograph of, H. E. Wood, 507 
