Total carbon and nitrogen abundances were determined by using combustion-gas chromatographic techniques. Weighted mean analyses for bulk fines were 225 and 140 ppm total carbon and 150 and 100 ppm total nitrogen. Total carbon in fine breccia was 230 ppm; in coarse breccia, 100 ppm; in fine-grained rock, 70 ppm; and in medium-grained rock, 64 ppm. The finest sieved fraction had the highest carbon content. Total nitrogen in fine breccia was 125 ppm; in coarse breccia, 100 ppm; in fine-grained rock, 115 ppm; and in medium-grained rock, 30 ppm. The total carbon and nitrogen fines appear to be mixtures of indigenous lunar material together with meteoritic and solar wind components.