Science: Food Front

War-made food shortages have brought many an edible ugly duckling to the table. Some recent examples:

> Apple syrup (to supplement corn and maple syrups), made by concentrating the juice of fallen and cull apples to honey-thickness, was announced by the U.S. Department of Agriculture's Research Laboratory at Philadelphia. But its first wide use is industrial: to replace war-scarce glycerin for keeping tobacco moist.

> The outer green leaves of lettuce, rich in food values but long eschewed by packers and housewives, are being salvaged. Jorgen D. Bering at Salinas, Calif, is preparing...