Abstract
Young male rats were exposed to 0.8-1.5 ppm. ozone five days per week for a period of eighteen weeks, and various quantitative analyses of urinary constituents were done. A significantly lower titratable acidity and a higher pH was found in urine from test animals than from controls. Under a handicap of having narrow openings through which to obtain food, mean food intake and weight gain were consistently less in exposed than in control rats. When the openings were made uniformly larger, food consumption and weight gain were comparable in both groups.