Contents

Contents

• Science Graduate Students and Their Support

  By M. H. Trytten

  Science20 May 1949 : 505-508 Full AccessRestricted Access

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• Chemical Induction of Colonial Paramorphs in Neurospora and Syncephalastrum

  By E. L. Tatum, R. W. Barratt, V. M. Cutter Jr.

  Science20 May 1949 : 509-511 Full AccessRestricted Access

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• Purine Metabolism in Tetrahymena and Its Relation to Malignant Cells in Mice

  By G. W. Kidder, Virginia C. Dewey, R. E. Parks Jr., Gilbert L. Woodside

  Science20 May 1949 : 511-514 Full AccessRestricted Access

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• Crystalline Dihydrostreptomycin Sulfate

  By I. A. Solomons, Peter P. Regna

  Science20 May 1949 : 515 Full AccessRestricted Access

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• Crystalline Salts of Dihydrostreptomycin

  By F. J. Wolf, E. T. Elmendorf, R. G. Denkewalter, M. Tishler

  Science20 May 1949 : 515-516 Full AccessRestricted Access

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• Special Sample Tray for the Continuous Gas-Flow Type Counter Tube

  By G. E. Burch, J. A. Cronvich, T. Ray, P. B. Reaser, S. A. Threefoot

  Science20 May 1949 : 516-517 Full AccessRestricted Access

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• Male Frogs and Toads as Test Animals for Early Pregnancy and Certain Related Conditions

  By J. L. Bhaduri, N. R. Bardhan

  Science20 May 1949 : 517-518 Full AccessRestricted Access

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• A Study of Native Species of Male Toads as Test Animals in the Diagnosis of Early Human Pregnancy

  By Paul F. McCallin, Richard W. Whitehead

  Science20 May 1949 : 518-519 Full AccessRestricted Access

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• Vacuum-Paraffin Infiltrator

  By Emerich Ehrlich Jr.

  Science20 May 1949 : 519 Full AccessRestricted Access

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• The Effect of Supervoltage Cathode Rays on the Nonenzymatic Browning Reaction of Dried Fruits and on Chemical Compounds Pertaining Thereto

  By Bernard E. Proctor, Samuel A. Goldblith

  Science20 May 1949 : 519-522 Full AccessRestricted Access

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• Pyrolysis of Diphenyl Disulphide and the Formation of Free Radicals containing Univalent Sulphur

  By A. Schönberg, Ahmed Mustafa, Wafia Askar

  Science20 May 1949 : 522 Full AccessRestricted Access

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• Nicotinic Acid as a Growth Factor for Certain Orchid Embryos

  By Richard B. Bahme

  Science20 May 1949 : 522-523 Full AccessRestricted Access

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• Traveling Waves in the Brain

  By STANFORD GOLDMAN, WILLIAM F. SANTELMANN JR., WESTON E. VIVIAN, DOUGLAS GOLDMAN

  Science20 May 1949 : 524 Full AccessRestricted Access

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• Louisiana Oyster Production

  By GORDON GUNTER

  Science20 May 1949 : 524-525 Full AccessRestricted Access

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• Thiamin or Thiamine?

  By R. R. WILLIAMS

  Science20 May 1949 : 525 Full AccessRestricted Access

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• Freezing Laboratory Materials for Plant Science

  By GLADYS E. BAKER

  Science20 May 1949 : 525 Full AccessRestricted Access

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• NEWS and Notes

  Science20 May 1949 : 526-528 Full AccessRestricted Access

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