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[Page 84]
the Engine was going [illegible] Miles per hour and as the Power of Engines under similar circumstances is as the square of the diamr. of their Cu ylinders then [illegible] Horse Powers – say [illegible] Horse Powers for the Power of the Wildfire.
I understand that this Engine travelled at [illegible] Miles per Hour with a load of [illegible] Tons after it, I have not been told the Weight of this Engine but I will take it at [illegible] Ton [illegible] cwt and the Tender at [illegible] Ton [illegible] Cwt making together [illegible] Tons.
Now a Horse Power at [illegible] Miles per
[Page 85
hour is equal to [illegible] Pounds, therefore [illegible] Power of the Engine at [illegible] Miles per hour –
[illegible] Friction of Engine an Tender = [illegible] and [illegible] Pounds the Friction of a Ton on the Carriages, which is more than double the Friction of the Worst Carriage I ever tried – I should rather presume the Engine was not supplied with Steam neither could the effective Pressure be[illegible] Pounds per square Inch on the Steam Piston.
If we take the Effective Pressure at
