CS of hammer breaking limestone sample, DOLLY OUT to man breaking samples in laboratory. CS of man's hands pouring liquid on limestone, limestone dissolving, hands pouring mixture in pan, inserting pan in water, panning mineral. MS of wall mural depicting science and industry, TILT DOWN to men at work in mechanical testing room. Shots of men at work on Tukon micro-hardness and scratch hardness testers. MS of woman looking at label on clay sample, FOLLOW SHOT of woman turning, walking to table. DOLLY SHOT along table of woman weighing clay, of man mixing water with samples, of other man making briquettes, FOLLOW SHOT of man carrying tray of briquettes over to drying oven. CU of hand lifting door of kiln, inserting pan of samples in oven, closing door.