From the text 'This handbook is intended as a reference booklet for the forest— fire lookouts who are cooperating on Project Skyfire. Project Sky*fire has 2 broad objectives: (1) to gain a better understanding of the occurrence, behavior, and control of lightning fires, and (2) to evaluate the possibility of preventing or reducing lightning fires through cloud—modification operations. In addition to their primary duties of fire detection, Skyfire lookouts make periodic detailed observations of cloud conditions within 20 miles of their stations. Contained herein are photographs and descriptions of the sort of clouds the lookouts identify and record, and instructions on the use of equipment for finding the position and velocity of clouds. Although written primarily for the northern Rocky Mountain area in summer, the cloud-observation techniques will be applicable elsewhere.'