. They»are usedespecially in making roofs for manufactories whichproduce gases that corrode common wrought iron.The nails, after being cast from very hot metal insand molds, are made malleable by being exposedto a red heat for 72 hours in refractory retorts con-taining pulverized oxyd of iron and… … SSUED FKOM THE UNITED STATES PATENT OFFICE FOB THE WEEK ENDING SEPTEMBER 24, 1861.Reported Officially for the Scientific American. PATENTEES, BEAD THIS. The new Patent Laws which went into force on the2d of March last, authorized the Commissioner ofPatents to have all the specifications which…
Patents · Constructed · Graefenberg · Claim · Ment · Combination · Scientific American · Inventors · Double cylinder · Short time · Purpose set · River waters · Patent office · India rubber · Address munn · Great eastern · Rifled cannon
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