156 RADIOISOTOPES IN BIOLOGY AND AGRICULTURE 



24. Talalay, P., and G. M. V. Takano: Apparatus for Tube-feeding Rats, J. Lab. 

 Clin. Med., 40: 486-488 (1952). 



25. Katz, Joseph, Harry A. Kornberg, and Herbert M. Parker: Absorption of Plu- 

 tonium Fed Chronically to Rats. I. Fraction Deposited in Skeleton and Soft 

 Tissues Following Oral Administration of Solutions of Very Low Mass Concentra- 

 tion, HW-28991, Aug. 10, 1953. 



26. Bustad, Leo K.: Personal communication. 



27. Karlson, Alfred G., and William H. Feldman: Method for Repeated Intravenous 

 Injection into Guinea Pigs, Lab. Invest., 2: 451-453 (1953). 



28. Rust, John H., Robert A. Monroe, and W. E. Lotz: Venoclysis by Catheteriza- 

 tion; Some Pathologic Observations, Cornell Vet., 63: 193-198 (1953). 



29. Detrick, Lawrence A., and Bonnie Rhodes: A Note on an Apparatus for Prolonged 

 and Repeated Intravenous Infusions in Large Animals, /. Am. Phann. Assoc. 

 Sci. Ed., 41: 283 (1952). 



30. Kainer, R. A., and W. M. Dickson: An Examination of the Valves of the External 

 Jugular Veins of the Ox with Reference to the Selection of a Site for Venipunc- 

 ture, J. Am. Vet. Med. Assoc, 122: 523-526 (1953). 



31. Carle, B. N., and William H. Dewhirst: A Method for Bleeding Swine, J. Am. Vet. 

 Med. Assoc, 101: 495-496 (1942). 



32. Baurmash, L., F. A. Bryan, R. Dickinson, and W. C. Burke, Jr.: A New Exposure 

 Chamber for Inhalation Studies, UCLA-231, Oct. 22, 1952. 



33. Smith, F. A., and D. E. Gardner: A Preliminary Investigation of Blood Fluoride 

 Levels Following Exposure to Hydrogen Fluoride at a Concentration of Approxi- 

 mately 29 Mg/m3, UR-77, Aug. 16, 1949. 



34. LaBelle, Charles, Clarence Booth, and Robert Barrett: The Retention of Uranium 

 Dioxide in Rabbits, AECD-2028, June 3, 1948. 



35. Kassel, Robert, and Seymour Levitan: A Jugular Technique for the Repeated 

 Bleeding of Small Animals, Science, 118: 563-564 (1953). 



36. Burris, R. H., P. W. Wilson, and R. E. Stutz: Incorporation of Isotopic Carbon 

 into Compounds by Biosynthesis, Botan. Gaz., Ill: 63-69 (1949). 



37. Chen, S. L. : Simultaneous Movement of P^^ and C''* in Opposite Directions in 

 Phloem Tissue, Am. J. Botany, 38: 203-211 (1951). 



38. Dubbs, Clyde A.: Improved Apparatus for Radiobiological Syntheses, Science, 

 109: 571-572 (1949). 



39. Clendenning, K. A., and P. R. Gorham: Intracellular Distribution of Assimilated 

 C'^ in Briefly Exposed Aquatic Plants, Arch. Biochem. and Biophys., 37: 56-71 

 (1952). 



40. Roach, W. A. : Plant Injection for Diagnostic and Curative Purposes, Imp. Bur. 

 Hart. Plantation Crops, East Mailing, Kent, Tech. Com m tin. 10, October, 1938. 



40a. Graham, Ben F., Jr.: A Technique for Introducing Radioactive Isotopes Into 

 Tree Stems, Ecology, 35: 415 (1954). 



41. Swanson, C. A., and J. B. Whitney, Jr.: Studies on the Translocation of Foliar- 

 applied P32 and Other Radioisotopes in Bean Plants, Arn. J. Botany, 40: 816-823 

 (1953). 



42. Epstein, Emanuel, and C. E. Hagen: A Kinetic Study of the Absorption of Alkali 

 Cations by Barley Roots, Plant Physiol., 27: 457-474 (1952). 



43. Colwell, Robert N.: The Use of Radioactive Isotopes in Determining Spore 

 Distribution Patterns, Am. J. Botany, 38: 511-523 (1951). 



44. Bledsoe, Roger W., C. L. Comar, and H. C. Harris: Absorption of Radioactive 

 Calcium by the Peanut Fruit, Science, 109: 329-330 (1949). 



45. Ulrich, Albert, Louis Jacobson, and Roy Overstreet: ITse of Radioactive Phos- 



