by a wire twisted aroundit. I then melted lead and old type metal, half and half, in aladle and poured it into the card mold. The heat of the boil-ing fluid melted the- tin on the brass sheet disk, without burn-ing the surrounding card, and when cold the disk and tubewere fastened firmly together…
Iron · Patents · Tube · Center · Consists · Wrought iron · Steel · Years ago · Tensile strength · Scientific American · Steel tube · Patent office · Square inch · Fatty acids · Cast Iron · Tea trade
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