Shots of a cut tree falling. Shots of logs rolling down hill into river. Shots of logs being skidded through forest. Shots of outdoor sawmill in operation. Shots of logged-over area. Shots of burnt-out forest area. Shots of men practicing fire fighting: using portable equipment. Several AERIAL SHOTs of Rockies, some snow covered. LS of pall of smoke from fire hanging over forest. Several LSs of Rocky Mountains. Several shots of men taking samples in forest. Several shots of men measuring depth of snow and taking samples. Hydrometric engineers measuring rate of flow of river. CSs of spruce budworm chewing spruce needles. CSs of the "needle miner" bug that attacks pine trees. LS of pine forest damaged by the "needle miner" bug. CSs of "bark beetle" on stripped tree. Shots of bull moose and cow eating reeds in swamps. Shots of sheep grazing in mountain range lands. CSs of gopher near his hole.