The manual is the second of six student manuals for use in a course on occupational health and safety for supervisory personnel. The manual contains lessons 4 and 5 of the 15 consecutively-numbered lessons, each of which contains study questions (and answers) interwoven with the text and review questions at the end of each section. (Lesson 4 discusses the supervisor's role in eliminating injuries and illnesses in the workplace and covers techniques for identifying and correcting the hazardous acts and work conditions which cause accidents, the personal and job-related factors which contribute to occupational injuries, and the importance of exercising employer control to effectively prevent injuries and illness. Lesson 5 discusses procedures for investigating and reporting accidents and exposures to health hazards in the workplace, and covers the contents of the investigation report, recommendations for corrective action, and the use of the concepts of loss severity potential and probable recurrence rate in setting priorities for corrective action. (JR)