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Scientific American, Vol. 67, No. 12 (1892) (1892)
leaf 3
tically. An inlet, threaded to receive a screw which it is destined. The tungsten can be added, The screw-cutting die head, or bolt-threading ma- alloyed with other metals ; still the most advantageous chine, shown in the illustration in perspective and in way consists in adding the tungsten before… … making a reliable and labor-saving R008’ FILLING APPARATUS.. © 1892 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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