Through some mischance a strange error appears in the review of Biochemistry and Behavior, Archives of Internal Medicine 116; 462; Sept. 1965. The reviewer wrote: 'Take as an example the first chapter, Energy, Respiration, and Psychological Function. This chapter explains the energy transactions through adenosine triphosphate, amplifies them with flow charts on the cycles involved, such as the Krebs' cycle and glycolysis...' The above sentence begins on line 8 of the second paragraph beginning in column 1 on page 462. Inadvertently alumprecipitated toxoid was substituted by adenosine triphosphate. The correction is stated above.