Escalator Harvesters: BOATING SHOTs of oyster fishermen tonging in dories. HAS of man picking oysters off conveyor of escalator harvester. TILT UP from man picking oysters on beach to LS of Biological and Fisheries Department station near Ellerslie, Prince Edward Island. Shots of fisherman tonging for oysters. Shot of men shovelling oysters out of boat into barrels on pier. HAS of street, war memorial in foreground in Charlottetown. HAS of street scene in Summerside. ESTABLISHING SHOT of fishing harbour at Alberton, Prince Edward Island. LSs of Fisheries Department motorboat "Cyprina", TILT UP alongside boat and escalator harvester. Various BOATING SHOTs of "Cyprina" at work. HAS of Moncton bore on Petitcodiac River. Underwater shots of oyster bed, of tongs raking up oysters.