Show j Working Wrought Iron. ! In a paper read before the Society of Chemical Industry the statement was made that the strength of cast iron was affected by the addition of wrought iron in the following proportions: propor-tions: With 100 parts offcast iron 10 parts of wrought iron increases the strength 2 per cent; 20 parts of wrought iron increases the strength 32 per cent; 30 parts of wrought iron increases the strength 60 per cent; 40 parts of wrought iron increases the . strength only 33 per cent. The maximum max-imum result is therefore produced with 30 per cent wrought scrap. J |