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Orseptemitoc at Liverpool wrote out. Orseptemitve
Mr. Jesse Hartley. Met me at the Rail Road at the Head of the Tunnel Eve Hill – to try Mr. Winnas, patent carriage, The Wheels that run upon the Rails are 20 Inches diamr. the Ends of the Axle trees are 1 ½ Inches diamr. & two Inches long these Run upon the inside of a friction Wheel which is 8 Inches in diameter and the Gudgeons are one Inch in diameter and 1 ½ in long as per figure in the Margin
– 20/1.5 = 13 1/3 Times, the diameter of the Wheel is larger Near the diameter of the End Gudgeon of the
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Axis & 8/1.5 = 5 1/3 Times that the Large Wheel and axis must turn Round to cause the friction Wheel to make one Revolution.
20 x 3.1416 x 5 1/3 = 62.832 x 5 1/3 – 335.104 Inches the large wheel must roll over, for one Revolution of the Friction Wheel which as the Gudgeon is one Inch diameter will have a Circumference of 3.1416 Inches & 335.104/3.1416 = 106.66. Times the Space gone over by the Large Wheel more than the Space Gone over by the Gudgeon of the friction Wheel on this 20 x 5 1/3 – 106 2/3 that is 106 2/3 to 1 or the relative velocities of the Carriage Wheel & Gudgeon of the Friction Roller.
