Technology Notes

> Sugar-coated steel is now being made, according to the American Iron & Steel Institute. Its advantage: when applied to molds, sugar is better than previously used pitch, tar, etc. in preventing molten steel from sticking to the walls and forming defects. The glossy caramel finish disappears during later processing steps.

> Ordinary soil mixed with 15% cement paves the three 3,000-ft. runways of a new 300-acre airfield owned by Brewster Aeronautical Corp. in Bucks County, Pa. This saved hauling countless tons of gravel and sand to mix with the cement, cut costs 40%, saved time too. The cement-and-dirt pavement can scarcely be broken with sledge hammers, can easily absorb the pounding of Flying Fortresses, is expected to last over ten years. Air force engineers who developed it expect small cracks to appear during the winter, will seal the field with asphalt to prevent ice heaves.

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