CAJORI, F., Number of U. S. Scientists and Sigma Xi, Calendar, Perpetual, A. L. CANDY, 286; Reform, A. L. California, Acad. of Sci., Expedition to Revillagigedo CAMPBELL, C. M., Musical Echoes, 540 CAMPBELL, D. H., Classification, 403 CAMPBELL, G. A., "Definitive Units" for Universal Use, Cancer, in Plants and in Man, E. F. SMITH, 419, 595 Carbohydrates in Maize Pollen, A. E. LONGLEY, Carnegie Inst. of Washington, Exhibition, 81 CASE, E. C., Preservation of Fossil Material, 543 542 CHAMBERLAIN, C. J., The Origin of Cycads, 73 CHAMBERLIN, J. C., Mineral Oil as Preservative, 634 Chemistry, Colloid, Nat. Inst. for Research, 333 Chigger, Native Host of the, A. E. MILLER, 345 284 CLARK, A. H., Navy's Oceanographic Program, 269 COCKERELL, T. D. A., The Fauna of British India, Coconut Bud Rot, C. M. TUCKER, 186 COLE, W. H., and D. POTTER, Fresh-water Sponges, 391 COLLEY, R. H., Timber Supply, 107 Colloid, Phenomena J. ALEXANDER, 312; Chemistry, Colloidal Solutions, P. L. DU NOUY, 117 Colloids, Older Publication on, J. ALEXANDER, 184 CONKLIN, E. G., Dr. Henry Fox and Mercer Univ., 176 Crop Protection Institute, P. MOORE, 348 CUNNINGHAM, B., Legislation on Evolution, 541 CURTIS, H. D., The Equinox of 1950.0, 169 CURTIS, W. C., Jonas Viles, Jr., 632; Controversy over CUSHING, H., Experimentum Periculosum, 373 DAHLGREN, U., Biol. Survey of Mt. Desert Isl., 435 DANFORTH, C. H., Number of Brothers and Sisters, 17 Darwin and Bryan, E. L. RICE, 243 DAVENPORT, C. B., Genetics and Eugenics, W. E. Castle, DAVIES, D. C., Field Museum Expeditions, 199 Davis, A. L., Calendar Reform, 611 DAVIS, E. H., The Method of Science, 610 DAVIS, J. J., Ind. Acad. of Science, 95 DAVIS, W. M., The Undertow Myth, 206 Dawson, A. B., Mesonephric Tubules, 262 DAY, A. L., Earth Movements in California, 323 DEAN, P. M., Stereochemistry in France, 178 Decomposition of H2O, W. P. DAVEY, 388 Deep Sea Tides, Measuring of, R. W. WOOD, 365 "Definitive Units" for Universal Use, G. A. CAMPBELL, Dinosaur Feed, G. R. WIELAND, 601 Discussion and Correspondence, 17, 41, 65, 87, 117, 184, 206, 232, 260, 284, 312, 339, 365, 388, 414, 442, 468, 489, 515, 540, 566, 588, 609, 630, 656 Disease, Saprophytic Microorganisms and, R. P. STRONG, 97; and Human Constitution, G. DRAPER, 525 DONALDSON, H. H., Rat Population, 305; Wistar Inst., 480 DONHAM, C. R., Salmon Poisoning of Dogs, 341 DOOLITTLE, A. A., Waterproofing Labels, 591 DOYLE, L. P., Parathyroids in Chickens, 118 DRAPER, G., Human Constitution and Disease, 525 Earth Movements in California, A. L. DAY, 323 Earthquakes, Prediction of, R. H. FINCH, 42; W. BOWIE, ECKART, C., Metastable Helium and Mercury, 517 Ecological Soc. of Amer., A. O. WEESE, 291 Edison, Thomas Alva, Tablet in Honor of, 584 Editorial Service, G. S. FULCHER, 389 EIKENBERRY, W. L., Shadow Bands, 566 Electrical Charges of Living Cells, L. V. HEILBRUNN, 236 ELIOT, C. W., Teaching of Botany, 609 EMERSON, A., Jungle Laboratory of Tropical Biology of EMMEL, V. E., The Non-nucleated Cellular Elements of Engineering, Foundation, 60; and Industry, 227, 649 Ether Drift, P. R. HEYL, 515; D. C. MILLER, 617 Evolution, Teaching of, R. C. MULLENIX, 18; in Educa- tion in California, 367; in N. C., B. W. WELLS and Z. P. METCALF, 445; and Chance, J. R. SWANTON, 490; Legislation on, B. CUNNINGHAM, 541; Controversy Experimentum Periculosum, H. CUSHING, 373 Fellowships, in Cooperation with Bur. of Mines, 360; Na- tional Research, in Medicine, 512, in Biology, 625; Gug- genheim Memorial Foundation, 605 FENNEMAN, N. M., Classification of Natural Resources, 191 Field, Museum of Natural History, Scientific Expeditions, FINCH, R. H., Earthquake Prediction, 42 Fisheries Conservation Conference, 649 2 Fluorine, Effect on Growth and Reproduction of Rats, J. Foresters, Soc. of Amer, R. V. REYNOLDS, 346 Forestry, Work in, 14; Int. Congress of, 462 FORTNER, H. C., A Field Trip Aid, 446 Fossil, Historic, G. R. WIELAND, 541 Fox, H., Georgia Acad. of Science, 48 Fox, Dr. Henry, and Mercer Univ., E. G. CONKLIN, 176 Freedom of Teaching in Science, S. J. HOLMES, 276 FROST, A. W., Exercise and Rickets in Rats, 447 FROST, E. B., Eclipse of January, 1925, 41 FULCHER, G. S., Editorial Service, 389 Gamma Alpha Graduate Scientific Fraternities, 158 GARREY, W., E., Memorial of Jacques Loeb, 198 GARRISON, F. II., Sir Thomas Clifford Allbutt, 330; Sir GATES, F. C., Hemerarch and Feralarch, 260 Geneticists interested in Agriculture, 347 Geographers, Amer. Assoc. of, C. C. COLBY, 238 Geography Teachers, Nat. Council of, J. G. MILLER, 240 Geological, Observation on the Island of Maui, Hawaii, N. E. A. HINDS, 316; Int. Congress, 383 Geologists, States, Amer. Assoc. of, 227 Georgia, Acad. of Science, H. Fox, 48 GERMANN, A. O. F., Carbon Monoxide, 70; What is an Germination of Barley, H. V. HARLAN, 566 Gesell, A., Mental Growth of the Child, L. M. TERMAN, 445 Gibbs, Willard, Works of, A. E. VERRILL, 41 GILES, A. W., Thomas Leonard Watson, 225 Goldsmith, W. M., Evolution or Christianity, D. S. JOR- Golgi Apparatus, in Gland Cells, R. H. BOWEN, 545 GREENE, C. W., Reactions of California Hagfish, 68 GREENMAN, M. J., The Wistar Institute, 473 GRINNELL, J., Introduction of Alien Game Birds, 621 Grout, A. J., Mosses, G. E. NICHOLS, 591 Guadaloupe Island, L. M. HUEY, 405 GUDGER, E. W., Bibliography of Fishes, 516 Guggenheim, Daniel, School of Aeronautics, 625; Memo- rial Foundation Fellowships, 605 GUYTON, T. L., Pennsylvania Acad. of Sci., 593 Hagfish, California, Reactions of, C. W. GREENE, 68 HALL, D., Agricultural Research and the Community, 399 HALL, R. P., Twinning in a Mollusc, 658 Hall of Fame for Engineers, 36 HALTER, C. R., Staining Paramecium, 90 HAMER, R., The Appeal of Physics, 109; Moseleyum, 208 HANCOCK, H., Algebraic Numbers, 5, 30 HANNA, G. D., Miocene Marine Vertebrates, 71 HANSEN, . A., Potato Poisoning, 340 HARLAN, H. V., Germination of Barley, 566 HARRIS, J. A., W. F. HOFFMAN and A. H. JOHNSON, The Reaction of the Cotton Plant, 65 HARRIS, R. G., White Indians, 460 HARSHBERGER, J. W., Catalogue of the Mycological Li- brary of Howard A. Kelly, L. C. C. Krieger, 186; Dis- Harvard, Univ., Medical School, Lectures, 112; Awards HAUPT, A. W., The Stem of Magnolia, 469 Hayford, John Fillmore, 332, 583 HEILBRUNN, L. V., Electrical Charges of Living Cells, 236 Helium, Disappearance in Geissler Tubes, H. B. LEMON, 516; Metastable and Mercury, The Life of, G. ECKART, 517; Arc Lines of below the Ionization Potential, C. B. Helmholtz's Physiological Optics, S., 235 Hemerarch and Feralarch, F. C. GATES, 260 HENRICI, A. T., Cytomorphosis in Bacteria, 644 HERRE, A. W., A Philippine Rorqual, 541 HEYL, P. R., Fundamental Concepts in Physics, 221; The HILL, A. E., Amer. Chem. Soc. at Baltimore, 637 HINDS, N. E. A., Geological Observations on the Island of Hippocrates, Quotation from, F. G. BENEDICT, 444 HIRSCHFELDER, A. D., and R. L. GREGORY, Membrane HOFFMAN, F. K., Social and Economic Sciences, Sect. of HOLMES, S. J., "Age and Area" and Extinction, 77; Honor to Whom Honor-, W. A. OLDFATHER, 184 HRDLIČKA, A., Anthropological Studies on the Yenisei HUEY, L. M., Guadaloupe Island, 405 Illinois, Acad. of Science, C. F. PHIPPS, 396 Indiana, Acad. of Science, J. J. DAVIS, 95 Indians, White, R. G. HARRIS, 460 Innervation, Reciprocal, in the Frog, J. B. STEIN and J. Insecticides, Plant, S. MARCOVITCH, 22 Interior, Dept. of, Reorganization, 560 International, Cooperation, C. E. HUGHES, 24; Annual Iron, The Oxygen-Carrier of Respiration Ferment, O. IVES, H. E., Optics, Schuster and Nicholson; Light, R. Ivy, Poison, Taxonomy and Range of, J. B. MONAIR, 589 JACOBSON, C. A., Chemical Spelling, 590 KAHLENBERG, L., Detecting Acetone, 344 Kennelly-Heaviside Layer, A. MCADIE, 540 KIENHOLZ, R., Botany, W. H. Brown, 567 KIESS, C. C., Arc Spectrum of Nitrogen, 468 KINGSLEY, J. S., Louis Agassiz and "Darwinism," 234 KNOWLTON, F. H., Origin of the Angiosperms, 568 KOCH, E. M., and F. C. KOCH, Trehalose in Yeast, 570 KORSTIAN, C. F., Western Yellow Pine, Bark Beetles and Krieger, L. C. C., Catalogue of the Mycological Library KUDO, R., Microsporidia, 366 Labels, Waterproofing, A. A. DOOLITTLE, 591 LANDSTEINER, K., and C. P. MILLER, JR., The Bloods of LANE, H. H., Laboratory Manual of the Foetal Pig, 658 LANGWORTHY, C. F., Food Products, H. C. Sherman, 44 LARGE, T., Geology and Physiography at Northwestern LATIMER, H. B., Anatomical Spelling Match, 89 LEACH, J. G., Seed-corn Maggot and Potato Black-leg, 120 LECKERT, E. L., New Orleans and Yellow Fever, 235 Leidy, Joseph, Memorial Award, 384, 536 LEIGHTON, M. L., Thomas L. Watson, 255 LEMON, H. B., Disappearance of Helium in Geissler LESLEY, J. W., and M. C. MANN, Triploidy in the To- Lewis, I. M., Solar Eclipses, F. SLOCUM, 262 Lewis, Sinclair, Arrowsmith, T. J. LEBLANC, 632 Light, The Scattering of, P. D. FOOTE and A. E. RUARK, LILLIE, F. R., Nat. Research Fellowships in Biology, 625 LIND, S. C., and D. C. BARDWELL, Mercury and Ionized LIVINGSTON, B. E., Permanent Secretary's Report of Loeb, Jacques, Memorial of, W. E. GARREY, 198 LONGLEY, A. E., Carbohydrates in Maize Pollen, 542 MCADIE, A., The Kennelly-Heaviside Layer, 540 MCCLUNG, C. E., The Zoological Record, 232 MacDonald, W., The Intellectual Worker, W. P. TAY- MACDOUGAL, D. T., Tree Trunks and Growth, 370 MCLEOD, J. W., Bacterial Catalase, 630 MCNAIR, J. B., Taxonomy and Range of Poison Ivy, 589 Males, Haploid, J. T. PATTERSON and G. W. D. HAM- Mammalogist, Amer. Soc. of, A. B. HOWELL, 615 Manganese as a Cure for a Chlorosis of Spinach, F. T. Manometer, Membrane, A. D. HIRSCHFELDER and R. L. MARCOVITCH, S., Plant Insecticides, 22 Market Charts and Law of Supply and Demand, P. G. Mathematical, Soc., Amer., R. G. D. RICHARDSON, 188; A. DRESDEN, 216, 615, 660; W. B. FITE, 424; Assoc. Mathematics, Notable Gift to, H. E. SLAUGHT, 410; MAURY, C. J., New Formational Name, 43 Medal, Daniel Giraud Elliot, 410 Medicine, Teaching, and Practice, W. S. THAYER, 349; MEES, C. E. K., Int. Congress of Photography, 438 MEGGERS, W. F., and O. LAPORTE, Arc Spectrum Regu- Meisel, M., Bibliography of American Natural History, MENZIES, A. W. C., E. M. COLLINS and P. L. TYSON, Circulation Pump for Gases, 288 Mercury, and Ionized Helium, S. C. LIND and D. C. Meteorite, Fall in British Columbia, H. I. SMITH, 118 Metric Assoc., H. RICHARDS, 650 METZ, C. W., Chromosomes and Sex in Sciara, 212 Microscopical Soc., Amer., H. J. VAN CLEAVE, 291 MILLER, A. E., Native Host of the Chigger, 345 MILLER, D. C., Ether Drift Experiments, 617 Mines, Bur. of, Transfer to Dept. Commerce, 604 MITCHELL, P. C., The Zoological Record, 66 MITCHELL, S. A., Shadow Bands, 365 MOON, E. A., and H. G. BRAY, Tilting of the Continental Moore, D. V. T., Dynamic Psychology, R. H. SEASHORE, MORRISON, T. F., Polarized Light and Luminous Bacteria, MOULTON, C. R., Cattle Feeds, 18 Muir, John, Naturalist and Poet, D. S. JORDAN, 582 MULLENIX, R. C., Teaching of Evolution, 18 MURNAGHAN, F. D., Calculus of Variations, G. A. Bliss, Muscle vs. Mussel Shoals, G. H. MATTHES, 209 Muscular Contraction, A Model of, T. SOLLMANN, 570 Museums, Amer. Assoc. of, St. Louis Meeting, 510 Musical Echoes, C. M. CAMPBELL, 540 Musselshell River, H. S. PALMER, 590 NABOURS, R. K., The New Secretary of Agriculture, 416 Name, New Formational, C. J. MAURY, 43 Naples Zool. Sta. and Amer. Assoc., B. E. LIVINGSTON, National Academy of Sciences, 485, 518, 535, 546 Nature-Study Soc., Amer., A. B. COMSTOCK, 292 Navy's Oceanographic Program, A. H. CLARK, 269 NEWTON, A. J., Royal Photographic Society, 409 New York Acad. of Medicine, 280 NICHOLS, G. E., Mosses, A. J. Grout, 591 Nicholson, Optics, H. E. IVES, 341 Nitrogen, Arc Spectrum of, C. C. KIESS, 468 Northwest Sci. Assoc., Geology and Physiography at, Norwegian Identity Book, X, 470 NOUY, Du, P. L., Colloidal Solutions, 117; Detecting NUTTING, P. G., Market Charts, 339 Oats, Smut of, Treatment for, R. C. THOMAS, 47 Official Seed Analysts, Assoc. of, A. L. STONE, 347 Oklahoma, Acad. of Science, H. RICHARDS, 396 "Organic Syntheses," Unpublished Preparations for, 534 OSGOOD, W. H., James Simpson-Roosevelt Expedition, 461 Oxford, Univ., Museum Scientific Instruments, 648 PAINTER, T. S., Chromosome Numbers in Mammals, 423 PALMER, H. S., Musselshell River, 590 PAMMEL, L. H., Extension of the Yucca Moth, 414 Paramecium, Staining, C. R. HALTER, 90; Acidity of Parasitologists, Amer. Soc., W. W. CORT, 82 Parathyroids, Enlarged, in Chickens, L. P. DOYNE, 118 Park, National, in Belgian Congo, 623 Patents, the Administration of, 382 Pathology, Exper., Amer. Soc. for, E. B. KRUMBHAAR, 320 PATTERSON, T. J., and G. W. D. HAMLETT, Haploid PEARCE, L., African Sleeping Sickness, 90 PEARL, R., Francis Galton, K. Pearson, 209; Almshouse Pearl, Human Biology, S. J. HOLMES, 313 Pearson, K., Francis Galton, R. PEARL, 209 PEARSON, R. A., The Agricultural Situation, 217 Pennsylvania, Acad. of Science, T. L. GUYTON, 593 Penrose Medal, First Award, 380 Pharmacology and Exper. Therapeutics, Amer. Soc. for, Phi Delta Kappa Educ. Fraternity, L. A. PECHSTEIN, 348 Philological Sciences, Report of Committee, W. A. OLD- Philosophical Soc., Amer., Annual Meeting, 536 PHIPPS, C. F., Illinois Acad. of Science, 396 Phi Sigma Biological Soc., C. I. REID, 292 Physics, The Appeal of, R. HAMER, 109; Fundamental Concepts in, P. R. HEYL, 221; The Trend of Thought Physiological, Teaching and Research, A. V. HILL, 295; Physiologists, Plant, Amer. Soc. of, W. A. GARDNER, 267 Pine, Western Yellow, Bark Beetles and Mistletoe, C. F. Pittsburgh, Univ. of, Jungle Laboratory of Tropical Plant Sciences, Int. Congress of, B. M. DUGGAR, 58 Polarized Light and Luminous Bacteria, T. F. MORRISON, Population of Canada, EDWIN B. WILSON, 87 Potato, Blackleg, J. G. LEACH, 120; Poisoning, A. A. HANSEN, 340; Assoc. of America, W. STUART, 347; Mosaic Virus, P. K. OLITSKY and J. H. NORTHROP, 544; Tuber, Titanic Acid in, W. P. HEADDEN, 590 POTTER, D., and W. H. COLE, Fresh-water Sponge, 391 POUND, R., Student Misinformation, 261 President of the United States, Address, 23 Proteins, detecting in a Solution, P. L. DU NOUY, 472 Radio, Scientific, Int. Union of, 200; Luminescence, Decay and Regeneration of, C. H. VIOL, G. D. KAMMER and Ramsay Memorial Laboratory, 12 RANSOME, F. L., Basin Range Structure, 659 Rat Population, H. H. DONALDSON, 305 REID, H. F., International Geophysical Union, 328 RICE, E. L., Darwin and Bryan, 243 RICE, E. W., JR., Award of the Franklin Medal to Pro- RICHARDS, H., Okla. Acad. of Sci., 396; Metric Associa- RICHTMYER, F. K., Apparatus Makers and Users, 616 Rickets in Rats and Exercise, A. W. FROST, 447 ROGERS, L. A., Type Cultures of Bacteria, 179 Rorqual, Philippine, A. W. HERRE, 541 ROSE, D. H., and N. E. STEVENS, Politeness of American Royal, Institution Lectures, 13; Photographic Society, Russell, I. K., Holes in Bread, D. S. JORDAN, 446 S., Helmholtz's Physiological Optics, 235 S., W. A., Townshend Stith Brandegee, 464 Salyer, A. M., Antics of Ants, D. S. JORDAN, 446 SATTERLY, J., Significant Figures, 90 SCHMIDT, J., Oxygen in the Ocean, 592 SCHULZ, J. A., and A. R. LAMB, Growth and Reproduction Schuster and Nicholson, Optics, H. E. IVES, 341 Scientific, Events, 12, 35, 59, 81, 110, 178, 199, 226, 253, 279, 306, 332, 359, 382, 408, 437, 462, 483, 510, 533, 560, 583, 603, 623, 648; Notes and News, 14, 38, 61, 83, 112, 180, 202, 229, 256, 281, 308, 335, 361, 384, 411, 439, 464, 485, 512, 536, 563, 586, 606, 626, 658; Books, 20, 44, 67, 185, 209, 235, 262, 287, 313, 341, 416, 445, 470, 491, 541, 567, 591, 611, 632, 658; Research, M. I. SEASHORE, R. H., Dynamic Psychology, D. T. V. MOORE, Sea-Urchins, Sex Chromosomes of, EDMUND B. WILSON, Seed-corn Maggot and Potato Blackleg, J. G. LEACH, 120 Seismograph, A Natural, J. M. CLARKE, 391 Seismological Soc. of Amer., S. D. TOWNLEY, 604 SEVERINGHAUS, E. L., and M. E. SMITH, The Pancreatic Sigma Xi, Number of U. S. Scientists, F. CAJORI, 117, 157; Aid to Research, 334; and Calif. Inst. of Tech., J. Significant Figures, J. SATTERLY, 90 SLAUGHT, H. E., Notable Gift to Mathematics, 410 Sleeping Sickness, African, L. PEARCE, 90 SLOCUM, F., Solar Eclipses, I. M. Lewis, 262 SMALLWOOD, W. M., Noise and Hearing, 415 SMITH, C. A., Utah Academy of Science, 594 SMITH, C. M., The Alkaline Reaction of the Dew on Cot- Smith, Douglas, Foundation for Medical Research, 561 SMITH, F., Fresh-water Medusae, 588 SMITH, G. O., Alfred Hulse Brooks, 80 SMITH, H. I., Meteorite in British Columbia, 118 SNYDER, C. D., Physiology, W. M. Bayliss, 416 SNYDER, T. E., Termites in Buildings, 389 SOLLMANN, T., A Model of Muscular Contraction, 570 Soviet Union, Soc. for Cultural Relations, 624 Special Articles, 22, 45, 68, 90, 118, 186, 212, 236, 263, 288, 316, 344, 370, 392, 420, 447, 472, 492, 517, 544, 570, Spongilla lacustris Linn., W. H. COLE and D. POTTER, 391 STEIN, J. B., and J. TULGAN, Innervation in the Frog, 185 Stereochemistry in France, P. M. DEAN, 178 Sterility, Flower and Fruit, Int. Conference on, A. B. STONER, D., Toll of the Automobile, 56 STOUT, A. B., Int. Conference on Sterility, 226 STRONG, R. P., Saprophytic Microorganisms and Diseere, 97 SWANN, W. F. G., The Trend in Physics, 425, 453 SWANTON, J. R., Chance and Evolution, 490 TAYLOR, W. P., Intellectual Worker, W. MacDonald, 20 TERMAN, L. M., Mental Growth of the Child, A. Gesell, 445 Termites in Buildings, T. E. SNYDER, 389 Tilting of the Continental Shelf of North America, E. Tomato, Triploidy in, J. W. LESLEY and M. C. MANN, TOWNLEY, S. D., Seismological Soc. of Amer., 604 Traffic Signals, Confusing, H. A. AIKINS, 442 TREASHER, R. C., Loess of the Palouse Region, 469 Tree Trunks and Growth, D. T. MACDOUGAL, 370 TRELEASE, S. F., and B. E. LIVINGSTON, Attendance at Ultraviolet Light and Scurvy, J. H. CLARK, 45 Undertow Myth, W. M. DAVIS, 206; W. C. JONES, 444; University and Educational Notes, 17, 41, 65, 86, 116, 183, 205, 232, 259, 284, 311, 339, 365, 388, 414, 442, 467, 489, 515, 539, 565, 588, 609, 629, 655 UPHOF, J. C. TH., Symbionts of a Lichen, 67 Van Denburgh, John, B. W. EVERMANN, 508 VAN NAME, W. G., Anti-conservation Propaganda, 415 VERRILL, A. E., Works of Willard Gibbs, 41 Viles, Jonas, Jr., Scholarship, W. C. CURTIS, 632 VIOL, C. H., G. D. KAMMER and A. L. MILLER, Decay and Regeneration of Radio-luminescence, 489 WALCOTT, C. D., Science and Service, 1 WARBURG, O., Iron, the Oxygen-Carrier of Respiration WASHBURN, E. W., Atmosphere and Physical Measure- ments, 49; International Annual Tables, 279 Washington, Academy of Science, 323 WATERS, C. E., William Francis Hillebrand, 251 Watson, Thomas Leonard, A. W. GILES, 225, M. M. Weather Conditions at Sumatra, C. BRAAK and C. G. WELLS, B. W., and Z. P. METCALF, Evolution in N. C., 445 WHITMORE, F. C., Amer. Chem. Soc., 493 WHITTEN, J. L., and D. P. SMITH, Unicrystalline Palla- WIELAND, G. R., A Historic Fossil, 541; Dinosaur Feed, WIEMAN, H. L., Heteroplastic Grafts in Amblystoma Wilder, Burt Green, J. H. COMSTOCK, 531 Wild Flower Preservation Soc., E. T. WHERRY, 268 WILSON, EDWIN B., Population of Canada, 87 WILSON, EDMUND B., Sex-Chromosomes of Sea-Urchins, 184 WINCHELL, A. N., Atoms and Isomorphism, 553 Wistar Institute, 439; M. J. GREENMAN, 473; H. H. WOOD, R. W., Measuring Deep Sea Tides, 365 WYCKOFF, R. W. G., F. L. HUNT and H. E. MERWIN, X, Norwegian Identity Book, 470 Yale Astronomical Station in South Africa, 36 Yeast, Trehalose in, E. M. KOCH and F. C. KосH, 570 Zirconium, Purification of, D. H. BROPHY, 372 |