description. The apparatus used foretching on the plate, and which is attached tothe opposite end of the projection-bar i, is re-presented in plan at fig. 2; it consists of asystem of levers, so arranged that the etchingpoint will always be projected in a straight linefrom the end of the bar ; i… … Fig. 1. are connected at the top by a transverse e tothe cap /; from e is elevated a drawing-boardg, firmly secured in a vertical position, againstwhich is placed the plate of metal or othermaterial on which the subject is to be trans-ferred. From the cap/ is supported an arm\h, which carries, by…
Design · Decoration and ornament · Art
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