Note 154 — Chapter LII · MANUFACTURE OF COTTON

Mr Williams, in his annual report to the Chief Inspector of Factories for the year 1900, gives the results of his examination of air from thirty-five weaving-sheds before and after the ventilation had been improved so as to comply with this regulation. The average of the amounts of carbonic acid found in the air of the sheds before the improvement of the ventilation was 13 per 10,000, and after the improvement 7.9 per 10,000. If the usual amount of carbonic acid in the outside air of towns (4 per 10,000) be deducted, the amount of impurity due to respiration is seen to be in the one case 9 parts, and in the other only 3.9 parts per 10,000.