Trans. R. Dubl. Soc., Ser. II., Vol. VIII. Prarr 1X. 
Swedish Charcoal Iron, 
Deeply etched. x 1000. 
Aluminium Iron. 
x 120 Lightly etched. x 2520 
Ferrite layer. 3 
BEMROSE & SONS, LIMITED DERBY, LONDON & WATFOOL 
