History of composing machines; a complete record of the art of composing type by machinery ... also lists of patents on composing machines, American and British, chronologically arranged (1904)
Thompson, John S. (John Smith), 1872- · Chicago, Inland Printer Co · leaf 115
should be increased or decreased to bring the line to a justified condition. The operator of the sec¬ ondary machine, in which the impressing of the … matrix material was done, by using this as copy, could produce accurately justified lines. The die case of the Heath Matrix Typograph is removable, and to change to another size of type 97
Typesetting machines
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.