This third entry of the 1940-41 production season deals with a new chemical substance which can be manufactured to take the place of silk in clothes. A third segment deals with election sign... Read allThis third entry of the 1940-41 production season deals with a new chemical substance which can be manufactured to take the place of silk in clothes. A third segment deals with election signs, and the concluding sequence is devoted to Alaska's salmon-fishing industry.This third entry of the 1940-41 production season deals with a new chemical substance which can be manufactured to take the place of silk in clothes. A third segment deals with election signs, and the concluding sequence is devoted to Alaska's salmon-fishing industry.