Partial ordering in theory of stochastic processes.

14A sample of thymidine was kindly furnished by Dr. E. E. Snell. 16 Stokstad, E. L. R., J. Biol. Chem., 139, 475 (1941). 16 Stokes, J. L., J. Bact., 48, 201 (1944). 17 Snell, E. E., and Mitchell, H. K., PROC. NATL. ACAD. ScI., 27, 1 (1941). 18 Barnes, F. W., and Schoenheimer, R., J. Biol. Chem., 151, 123 (1943). 19 Sonne, J. C., Buchanan, J. M., and Deluva, A. M., Ibid., 173, 69 (1948). 2 Buchanan, J. M., Sonne, J. C., and Delluva, A. M., Ibid., 173, 81 (1948). 21 Heinrich, M. R., Wilson, D. W., and Gurin, S., Federation Proc., 8, 205 (1949). 22 Fries, N., Arkiv. Bot., 33, 1 (1946). 23 Fries, N., Physiol. Plantarum, 1, 78 (1949). 24 Plentl, A. A., and Schoenheimer, R., J. Biol. Chem., 153, 203 (1944). 25 Brown, G. B., Roll, P. M., Plentl, A. A., and Cavaleiri, L. F., Ibid., 172, 469 (1948). " Bendich, A., Getler, H., and Brown, G. B., Ibid., 177, 565 (1949). 27 Loring, H. S., and Pierce, J. G., Ibid., 153, 61 (1944). 28 Loring, H. S., Ordway, G. L., and Pierce, J. G., Ibid., 176, 1123 (1948). 2 Reichard, P., Acta Chem. Scand., 3, 422 (1949).