Various authors have requested that the following changes be made in their published papers:
FORD, A. B., AND HELLERSTEIN, H. K.: Work and heart disease. I. A physiologic study in the factory. Circulation 18: 823, 1958.
On page 831, line 13, should read "… workers may expend energy at a higher rate off the job than on it."
- © 1959 American Heart Association, Inc.