. Bulletin - United States National Museum . del had been shipped toColumbus. This and the striking similarity of the model describedby Sellers to the model on exhibit at the Ohio State Museum im-mediately suggested that they were the same. Investigation revealed that the basic dimensions of the model areidentical to those Sellers lists in his Improvements (pp. 7-9): 8-inchtruck wheels, 14-inch driving wheels, 18-inch track gauge, 4^2-inchstroke, copper boiler, brass cylinders, and a tender mounted on 6wheels. An examination of the machine in 1961 further revealedthat the valve gear, fitted to
. Bulletin - United States National Museum . del had been shipped toColumbus. This and the striking similarity of the model describedby Sellers to the model on exhibit at the Ohio State Museum im-mediately suggested that they were the same. Investigation revealed that the basic dimensions of the model areidentical to those Sellers lists in his Improvements (pp. 7-9): 8-inchtruck wheels, 14-inch driving wheels, 18-inch track gauge, 4^2-inchstroke, copper boiler, brass cylinders, and a tender mounted on 6wheels. An examination of the machine in 1961 further revealedthat the valve gear, fitted to the rear driving axle, is identical to thatdescribed in Sellers British patent of 1847 (see fig. 29). Also, thecolumn attached to the frame to which the crosshead guide yoke isfastened has an identical block and threaded hole, now plugged, atits upper extremity. This can quickly be seen by referring to figures30 and 31. This hole was the point of fastening for the crossheadguide yoke for the upper cylinders. The smokebox, a square brass 69. Figure 33.—The Improved Boiler Was Designed to keepthe water level at line 0-0. Note the water leg projectingover the grates back toward the fire door and the watercourse running full length on the underside of the boiler.(From Sellers Improvements.) casting, has plugged holes indicating the position of the upper cylin-ders. Certain vestiges of the grade-climbing machinery are evi-denced by several studs on the frame behind the rear driving wheelsand by the continuous drawbar on the tender with a slot cut in theend sill. The true identity of the model had been lost through a misunder-standing at the time it was donated, and for nearly 60 years its con-struction has been credited to the donor, L. B. Davies. Thecorrection of this error would probably be of little comfort to Sellers,considering the bitter disappointments the grade-climbing locomo-tive and every venture connected with it held for him. When Sellers returned to Cincinnati in De
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
