Walking shots through Weather Bureau Laboratory showing woman working at desk, photos on wall, experimental set ups. CU PAN from one apparatus to another. Walking shot through laboratory. MSs, CUs of apparatus on bench. MS, CUs of rotating device similar to "dish pan". CUs of milliamp graph recorder. Various MSs of "dish pan", an apparatus designed to illustrate the coriolis effect in weather build up. Shot of man putting ice into centre of "dish pan". Brief shot of dye forming loops along rim of pan. CU of slowly rotating pan, dye forming loops. Vertical HAS of dish pan, camera turning with pan. Closer shots of effect of coriolis force on coloured dye, loops. HAMCS of "dish pan".