he greatest surfaces exposed to sliding friction are chilled, thus gain-ing parallel action, durability, and increased strength. Thechill is shown by the mottled appearance, seen on thebeam, and is one of the principal improvements claimed.Cheapness is secured by special machinery, which enables…
Ooo · Improved · Center · Saltpeter · Iron · Patents · Ooo ooo · Sewing machine · Cast Iron · Mother liquor · Wrought iron · Double eye · Chili saltpeter · Scientific American · Working men · York city
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