§ 1. (Manufacture of bichromate or chromate of potassium, or sodium): Special rules with regard to the employment of persons in chemical works in which is carried on the manufacture of bichromate or chromate of potassium or sodium.
52§ 2. (Use of phosphorus in the manufacture of matches): Special rules with regard to the employment of persons in lucifer match factories in which white or yellow phosphorus is used.