rs may be ground in wa-ter only, when the tint is made; and when theyhave been infused in water, they must be mixedup with size. If on new plaster, the colours re-quire more size. Pantograph. An instrument for copying andenlarging or diminishing drawings It was in-vented in the seventeenth century,… … sists of four brass or wooden rules, two of themfrom 15 to 18 inches long, and the other two half that length. On the exact fittings of the holesand joints chiefly depends the perfection of thisinstrument. Those in the middle of the longrulers at e and d, are to be at the same distancefrom those at…
Design · Decoration and ornament · Art
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