with a mixture of dilute and the inking being done two or more times for each im- advertising columns, to which the reader is referred. nitric acid and gum arabic. The acid attacks the portions of Although this is the largest-sized machine of the kind yet pression, as may be desired. Any kind of… … desired. Such large presses are very useful in the printing solves its substance ina peculiar manner, the dissolved por- to thirty times faster. The press from which our engraving of posters, maps, etc. We are informed by the firm in whose has been made will print blocks 60 by 40 inches, and as…
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