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1844 J. Timbs Year-bk. of Facts 50 The deposition of metals from metallic salts by the electro process.

1852 Househ. Words 22 May 227/2 Like plates multiplied by the electro-process—like the printer's ‘stereo’—like the reporter's ‘manifold’—you will find duplicates, triplicates of these forlorn beings everywhere.

1897 U.S. Patent 586,171 1/1 My invention simplifies the conditions of the electro process and furnishes means whereby the electrodeposition of metals can be carried on with great rapidity.

1936 C. Goodrich Migration & Econ. Opportunity vii. 386 Only in industries sometimes termed ‘electro-process’ industries—that is, electro-chemical and electro-metallurgical plants—is electric energy sufficiently important to be a major consideration.

1950 Amer. Sociol. Rev. 15 557/1 Important power-consuming industries such as the electro-process industries.

1957 W. H. Kerry Freehand Drawing & Pict. Illustr. for Draughtsmen i. 7 Pencil work can only be reproduced naturally by the half-tone process, which is more expensive that either the zinco or electro processes normally used for the illustration of ink drawings.