MLS of top of geyser column, TILT DOWN to ground, PAN to LS of crew taking readings in glaciation experiment. CU of volt meter. MLS of scientist dimly visible through mist reading volt meter. MCS of heavily dressed scientist, PAN to billowing steam cloud after geyser explosion. MS of group of three technicians in field, TILT UP to balloon holding cord impregnated with explosives, TILT DOWN. MS of man wearing yellow helmet, pointing upwards, silhouetted by sun behind him. MLS, CU of man turning detonator handle. Shot of two men dragging piece of equipment on sled through snow. LS of crew, PAN to geyser, TILT UP column of vapour a moment after eruption. Shot of pair of warmly dressed observers, PAN to base of geyser, TILT UP to top of column, TILT DOWN to observers. Closer shot of billowing cloud. Sequence of shots on bubbling hot springs, TILT UP and TILT DOWN column of stream. Shots of two men hoisting balloon. Vertical LAS of balloon rising. LS of column of geyser vapour, TILT DOWN to men inflating balloon. MS of dense steam, PAN to edge of cloud, PAN back to geyser during eruption.