Societies and Academies

Abstract

EDINBUBGH. Royal Society, July 7.-A. J. Clark, C. P. Stewart, and R. Gaddie: The metabolism of the heart. The frog's isolated heart, perfused with Ringer, maintained a regular contraction for 48 hours, and more than 90 per cent of the energy was derived from a non-carbohydrate source. The sugar consumption of the heart could not be increased materially by addition of glucose, serum, and insulin to the perfusion fluid. There was a small but steady excretion of nitrogen from the heart, and the oxidation of the protein equivalent of this nitrogen would have corresponded to about half the oxygen consumption of the heart. The respiratory quotient of hearts perfused with Ringer's fluid lay between 0-80 and 0-85, and did not rise above 0-90 when insulin and sugar were added. The results suggested that the isolated frog's heart used proteins as its chief source of energy.-E. T. Copson: The definite integrals of interpolation theory. The cardinal function of interpolation theory, introduced by Prof. Whittaker, has been represented by definite integrals in two distinct ways, the first due to W. L. Ferrar, the second to Ogria and J. M. Whittaker. In this note the relation between these representations is discussed.- J. Geronimus: On some persymmetric determinants.