NEW SERIES. VOL. XLVI.-JULY TO DECEMBER, 1917 THE NAMES OF CONTRIBUTORS ARE PRINTED IN SMALL CAPITALS Bergen, JOSEPH YOUNG, 379 BERRY, E. W., "Age and Area" Hypothesis, 539 BOWIE, W., Use of Mean Sea Level as the Datum BREED, R. S., Popular Science, 238 BROOKS, C. F., Aerography, A. McAdie, 264 BUMSTEAD, H. A., Ocean Magnetic Observations, L. BURGE, W. E., The Catalase Content of Insects, CAIRNS, W. D., Math. Assoc. of Amer., 207 Carnegie Institution and the Public, R. S. WOOD- Catalase Content of Insects, 295; of Breast Muscle, Cereal, Conference, 11; C. W. HUNGERFORD, 316 Chemical, Laboratories and National Welfare, W. A. NOYES, 1; Soc., Amer., Kansas City Meeting, 94; Boston Meeting, C. L. PARSONS, 108, 119, 143, 169, 542, 571, 596, 621, 645; Industries, Chemicals and War in England, 427 Chemistry, and Phytogeography, J. A. HARRIS, 25; Teaching, H. A. CURTIS, 183; Outlook, J. STIEG- LITZ, 321; Pre-medical Training in, F. S. HAM- METT, 504; Colloid, of Fehling's Test, L. ROSEN- Chemists, War Service for, C. L. PARSONS, 451 China, Agricultural Education and Research, 54 Church, Professor, Tribute to, 535 Cilia in the Arthropoda, N. FASTEN, 440 Climatic, Pulsations, C. E. VAIL, 90; Index, C. CLUTE, W. N., Names of Plants, 483 Coast and Geod. Sur. and the War and Navy De- COBB, N. A., Intra-vitam Color Reactions, 167 COCKERELL, T. D. A., Letters of, H. Münsterberg, Coincidence, Remarkable, W. W. CAMPBELL, 36 COLE, F. N., Amer. Math. Soc., 369, 518 COLLEY, R. H., G. B. POSEY and G. F. Gravatt, Color Reactions, Intra-vitam, N. A. COвв, 167 COMPTON, A. H., and O. ROGNLEY, Ultimate Mag- netic Particle, 415 CONN, H. J., Chemical Transformation of Soils, CONNER, S. D., Drainage and Soil Acidity, 346 Cook, O. F., Trans-Pacific Agriculture, 436 Cosmological Theory, W. H. MCNAIRN, 599 Cotton Rust in Texas, J. J. TAUBENHAUS, 267 CRANE, E. J., German-English Dictionary for Chem- Crossing-over in Sex Chromosomes, H. D. GOODALE, CURTIS, H. A., Teaching Chemistry, 183 Darwin, Erasmus and Benjamin Franklin, L. L. DAVIS, B. M., Amer. Soc. of Naturalists, 453 D. C., Amer. Assoc. of Variable Star Observers, 620 Discoveries and Inventions, 17 Discussion and Correspondence, 15, 36, 60, 88, 111, 139, 160, 183, 210, 237, 262, 288, 311, 340, 360, 386, 409, 432, 457, 483, 511, 538, 564, 586, 616, DOANE, R. W., Mites attacking Crops, 192; Smelter |