The New York dental journal . mprovements and new inventions. It seems but afew years since the introduction of steam, telegraphing, sewing 230 machines, and many other important inventions and discoveries, yetthe rapidity with which they have been cheapened, simplified, andrendered practical, substantial, and useful, can hardly be imagined bythe community. In taking a retrospective view of the dental profes-sion for the past few years, we can plainly see the same spirit of im-provement manifested in all its members, and the result of such spiritin every department of the art. But three or fou
The New York dental journal . mprovements and new inventions. It seems but afew years since the introduction of steam, telegraphing, sewing 230 machines, and many other important inventions and discoveries, yetthe rapidity with which they have been cheapened, simplified, andrendered practical, substantial, and useful, can hardly be imagined bythe community. In taking a retrospective view of the dental profes-sion for the past few years, we can plainly see the same spirit of im-provement manifested in all its members, and the result of such spiritin every department of the art. But three or four years have elapsedsince the introduction of the first vulcanizing machine. This was in-troduced by C. S. Putnam, of Paris. It was constructed of a largeboiler sufficiently large to drive a ten horse-power engine with water,pumps and safety-valve connected by a pipe of several feet with aniron steam-chamber, in which the pieces to be vulcanized were placed,requiring a practical engineer to use it. Robertss machine simplified. —IILTON 231 this process by using a stove heater and a cast-iron chamber for re-ceiving the water and piece to be vulcanized, separating them by twoplates of iron, perforated with holes, allowing the steam to pass to theupper part of the chamber, thus having boiler and steam chamber allin one; this he patented in 1858. This machine is fully representedin the accompanvino; eno-raving. In a short time after this machinewas made, he introduced an improvement, which consisted of a steamchamber and boiler the same as the first, using a small machine, andheating it with alcohol or gas as represented by the second engraving.
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectdentistry, bookyear18
