GUN COTTON AT THE U. B. TORPEDO STATION NEWPORT R. I. on the gun cotton appear as Sunken characters in the solid iron. In other words exactly the reverse effect is produced of that which would be anticipated. TESTS OF QUALITY OF IRON AND STEEL. produced with accuracy the openings forming depres sions while the contour of the interwoven wires re mained in relief. In this plate there was no trace or prove that no fusion took place. line. No impression of the letters was produced the vase to the central aperture was produced. THE INITIAL EXPERIMENT WITH CYLINDER OF GUN COTTON AND PLAIN IRON PLATE, scientific american, 1887-10-08
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