The book of the fair : an historical and descriptive presentation of the world's science, art, and industry, as viewed through the Columbian exposition at Chicago in 1893 ... (1893)
olygonal. So also with machines used for carving, stamping, molding, tonguing, and mortising lumber, and for ART SQUARE LOOM all the various operations in which machinery does the work that was formerly done by hand. Yet in each of these processes there is still much room for improvement. Among the… … VERTICAL SPINDLE MILLING MACHINE is greatly facilitated the handling of heavy lumber. I he same firm shows a double mortiser, mainly for door-work, an almost perfect specimen of labor- saving machinery. A Cincinnati manufacturer displays a matcher of improved design, with stationary bed, and of…
