Burn, Robert Scott · London : Ingram, Cooke, and Co. · leaf 146
estthe ground underneath the wax may have been re-moved. If not thus protected, the margin will befilled with holes, which are troublesome to remove. It is difficult to give any precise directions forbiting, as much depends on the strength of the acid,the hardness of the copper, and the degree of… … fig- 9* 1 \ \
Drawing · Wood-engraving
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