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[Page 78]
[illegible] Pounds the Power of the Engine at [illegible] Miles per Hour. taking the friction of the Engine Carriage at [illegible] Pounds per Ton, then [illegible] Tons the Weight of the Engine, will require [illegible] Pounds and[illegible] Pounds, the Power of the Engine applied to the Load of [illegible] Tons [illegible] Pounds the friction per Ton on the Carriages.
These were Mr. Winans Carriages with [illegible] Inch Wheels, as the Carriages were drawn each way along the Road the resistance of the Air would be neutralised, or the absolute effect would be the same as if the Carriages had been drawn through a still
[Page 79]
and calm atmosphere, as I am not informed of the surface of the Carriages opposed to the Air in direction of the Road I have no means of determining the amount of the Resistance per Ton from this cause.
I understand the Rails were swept & kept clean during the trial so that we may consider the experiment as made under the much favourable Circumstances.
My Calculation of the Power of this Engine see fol. Only , makes it equal to [illegible] Horse Powers at [illegible] Miles per Hour this would be only [illegible] horse Powers at
