THE NATURAL C CONTENTS OF MATERIALS FROM HARD-WATER LAKES.

op. cit., for zinc amalgam confirm this conclusion. For iron, on the other hand, the anodic surface becomes larger, the higher the value of current density externally applied for anodic polarization, and, hence, A is usually less than unity. 22 D. Leussing and I. Kolthoff, J. Am. Chem. Soc., 75, 2476 (1953).