. Bulletin - United States National Museum . Figure 35.—Top View of the 1850 Patent Model withboilers removed, showing the mounting levers, the counter-shaft and its cranks set at 90°, the four crossheads, and theconnecting rods. (Smithsonian photo 46884-C.) had observed, was able to keep water over the crown sheet re-gardless of the grade. Rearrangement of the machinery from an outside to an insideconnection had been proposed in the columns of the ScientificAmerican as early as the time of the New York trial.^i^ Sellersapparently had worked out this modification by the time the newboiler was
. Bulletin - United States National Museum . Figure 35.—Top View of the 1850 Patent Model withboilers removed, showing the mounting levers, the counter-shaft and its cranks set at 90°, the four crossheads, and theconnecting rods. (Smithsonian photo 46884-C.) had observed, was able to keep water over the crown sheet re-gardless of the grade. Rearrangement of the machinery from an outside to an insideconnection had been proposed in the columns of the ScientificAmerican as early as the time of the New York trial.^i^ Sellersapparently had worked out this modification by the time the newboiler was devised, for he included both ideas in his petition (Feb-ruary 20, 1849) for a new patent. It was issued on July g, 1850,as patent 7498. The original patent model is now in thecollections of the National Museum and is pictured in figures345 35. and 36. ^^ (August 19, 1848), vol. 3, p. 380. 74. Figure 36.—Bottom View of the 1850 Patent Modelshowing the toggles, adhesion wheels, and the draw-bar.(Smithsonian photo 46884-B.) While Sellers was working on his pamphlet and patent in Cin-cinnati, the affairs of the Panama Railroad were developing April 7, 1849, the company was incorporated in the State ofNew York. In October of that year a preliminary contract wastendered to George M. Totten and John C. Trautwine for con-struction of the road. About five years earlier, both hadsuccessfully surveyed a canal through tropical Colombia and weretherefore not without qualifications to undertake the presentproject. Norris, who had undoubtedly suffered especially from theheat and pests during the Panama survey because of his age andobesity, was no longer an active contestant for the contract. He ^^ Panama Railroad, executive committee minutes, October 12, 1849. 75 dropped out of the railroad to open a gold mine in the area whichlater proved a failure. Sellers was not, however
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
