American Textile Machinery Its Early History Characteristics Contributions to

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American Textile Machinery Its Early History Characteristics Contributions to
John L John Lord Hayes
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A few moments' immersion in nitric acid eats out the tracing to the proper depth. A design may be reduced from five to nine times from the original tracing, making it, when executed on the copper, very perfect, and the work may be done by any bright girl. By this machine, the cost of engrav- ing for calico-printing is enormously reduced, rolls which cost $23 to engrave by the old system, being executed for $2. 25, while the system permits the execution of designs so large as to be almost imprac...ticable with the former methods, f * W hippie's pentagraph, after being introduced at the Merrimaek Mills, was carried to Dover, N. H. , and put in use at the Cocheco Print Works. An English niLrniver, named Rigby, employed there, seeing the advantages of the machine, quietly made sufficient sketches of the machine for his purpose, and, returning to England, introduced it under his own name, where, witli some modifications, it is still in use.
t In the preparation of the statements respecting inventions in cotton machinery, we have had the privilege of consulting Colonel Samuel Webber,

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