Correction to "The stability of an nth-order nonlinear time-varying differential system"

The author of the above [ibid., vol. AC-13. pp. 99-102, Feb. 1968] has called the following to the attention of the Editor. Equations are corrected as follows: on page 99 (the first equation in the abstract), page 100 equation (1) and equation (12), page 101 equation (16) and (25).