54 RADIOISOTOPES IN BIOLOGY AND AGRICULTURE 



43. Craig, Roderick, and N. A. Olson: Rate of Circulation of the Body Huid in Adult 

 Tenebrio molitor Linnaeus, Anasa tristis (de Geer), and Murgantia histrionica 

 (Hahn), Science, 113: 648-650 (1951). 



44. Chen, S. L. : Simultaneous Movement of P^^ and C'^ in (3pposite Directions in 

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



45. Sheppard, C. W. : New Developments in Potassium and Cell Physiology: 1940- 

 50, Science, 114: 85-91 (1951). 



46. Thomas, R. O., T. A. Litovitz, M. I. Rubin, and C. F. Geschickter: Dynamics 

 of Calcium Metabolism: Time Distribution of Intravenously Administered 

 Radiocalcium, Am. J. Physiol., 169: 568-575 (1952). 



47. Flexner, Louis B., Dean B. Cowie, and Gilbert J. Vosburgh: Studies on Capillary 

 Permeability with Tracer Substances, in "Biological Applications of Tracer 

 Elements," Cold Spring Harbor Symposia Quant. Biol., 13 : 88-98 (1948). 



48. Overstreet, R., and T. C. Broyer: The Nature of Absorption of Radioactive 

 Isotopes by Living Tissues as Illustrated by Experiments with Barley Plants, 

 Proc. Natl. Acad. Sci. U.S., 26: 16-24 (1940). 



49. Visek, W. J., R. A. Monroe, E. W. Swanson, and C. L. Comar: Calcimn Metab- 

 olism in Dairy Cows as Studied with Ca 45, J. Dairy Sci., 36: 373-384 (1953). 



50. Van Middlesworth, Lester: Personal communication. 



51. Edelman, I. S., J. M. Olney, A. H. James, L. Brooks, and F. D. Moore: Body 

 Composition: Studies in the Human Being by the Dilution Principle, Science, 

 115: 447-454 (1952). 



52. Gregersen, Magnus I.: Blood Volume, Ann. Rev. Physiol., 13: 397-412 (1951). 



53. Hansard, Sam L., W. O. Butler, C. L. Comar, and C. S. Hobbs: Blood Volume 

 of Farm Animals, J. Animal Sci., 12: 402-413 (1953). 



54. Storey, R. H., J. Moshman, and J. Furth: A Simple Procedure for Determination 

 of the Approximate Lymph Space, Science, 114: 665-667 (1951). 



55. Fried, Maurice, and L. A. Dean: A Concept Concerning the Measurement of 

 Available Soil Nutrients, Soil Sci., 73: 263-271 (1952). 



56. Hendricks, Sterling B. : Radioisotopes in Fertilizer Usage, Soil Fertility and 

 Plant Nutrition, in "Use of Isotopes in Plant and Animal Research" (Conference 

 Sponsored by Kansas State College, Argonne National Laboratory, and Isotopes 

 Division, U.S. Atomic Energy Commission, June 12-14, 1952), TID-5098, pp. 

 41-47, April, 1953. 



57. Kleiber, Max, Arthur H. Smith, N. P. Ralston, and Arthur L. Black: Radio- 

 phosphorus (P32) as Tracer for Measuring Endogenous Phosphorus in Cow's 

 Feces, J. Nutrition, 45: 253-263 (1951). 



58. Visek, W. J., R. A. Monroe, E. W. Swanson, and C. L. Comar: Determination of 

 Endogenous Fecal Calcium in Cattle by a Simple Isotope Dilution ^Method, 

 ./. Nutrition, 50: 23-33 (1953). 



59. Comar, C. L., R. A. Monroe, W. J. Visek, and Sam L. Hansard: Comparison of 

 Two Isotope Methods for Determination of Endogenous Fecal Calcium, J. 

 Nutrition, 50: 459-467 (1953). 



60. Rosenblum, Charles: Applications of Isotope Labeled Vitamin Bi,., in "The Role 

 of Atomic Energy in Agricultural Research," Proceedings of the Fourth Annual 

 Oak Ridge Summer Symposium (Sponsored by the Oak Ridge National Labora- 

 tory and Oak Ridge Institute of Nuclear Studies, Aug. 25-30, 1952), TID-5115, 

 pp. 185-212, January, 1953. 



61. Gest, Howard, Martin D. Kamen, and John M. Reiner: The Theory of Isotope 

 Dilution, Arch. Biochem.. 12: 273-281 (1947). 



62. Keston, .\lbert S., Sidney Udenfriend, and R. Keith Cannan: Microanalysis of 



