"One run, No.4, was made in the continuous acid-treating plant during the quarter covered in this report. During the operation, light gas oil was acid-treated to improve its Diesel fuel characteristics. The operation was successful in improving the more important physical properties of the oil for use as Diesel fuel by the acid treatment. The cetane number of the treated oil was within acceptable limits; the Conradson carbon residue, though improved, did not meet the usual high-speed Diesel fuel requirements. The sulfur content of the oil was not affected appreciably."