172 



DR. F, II. r.KIFFITHS AND MR. EZER GRIFFITHS OX THK 



TABLE XXII. Iron (Ingot). 

 Weight, 2798 grms. Density, 7 '8 58. 



S, = G'1045 (l+0-001520<-0-000006m 2 )- 



This specimen was obtained from the American Rolling Mill Company, who 

 state : 



" Material rolled from an ingot into a billet (4 inches by 4 inches), on ' Blooming 

 Mill ' ; billet forged into round section at blacksmith's shop. Same had no 

 further annealing nor additional heat treatment, other than when rolled 

 and forged." 



Specimen turned down to size in laboratory workshop. 



" Sample from which material was taken and forged shows following analysis : 



Cu = 0'040 per cent. 

 O = 0'015 

 N = 0-0026 



' S = 0'021 per cent. 

 " P = 0-005 

 " C = 0-012 

 " Mn = 0-036 



H = O'OOOS 



" Silicon, trace ; Fe (by diffi), 99'87." 



Our sincere thanks are due to the American Rolling Mill Company, Middletown, 

 Ohio, U.S.A., for presenting us with this sample. 



TABLE XXIII. Zinc. 



Weight, 2538 grms. Density, 7-141. 



S, = 0-09176 



