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[Page 76]
Oksebruithe
Mr Erikson maintains that his Engine will work to an effective pressure if ht Pounds per square Inch upon the Steam Pistons of his Engine. Let us calculate what the Power of the Engine ought to be at [illegible] Miles per Hour.
It has been calculated at fol. that as Strokes per Minute or [illegible] feet velocity of the Pistons per Minute would be [illegible] Miles per hour, and the area of the Piston being [illegible] sqr. Inches.
[illegible] Pounds pressure per square Inch on each Steam Piston.
[illegible] Pounds raised one foot mechanic Power of one Piston or Cylinder
[Page 77]
[illegible] Horse Powers of one Cylinder at [illegible] Miles per Hour.
[illegible] Horse Powers of the Engine at [illegible] Miles per Hour
Mr. Erikson says his Engine is an eight Horse Power at [illegible] Miles per Hour, this would give [illegible] Pounds per Square Inch for the Effective Pressure of the Steam on the Piston.
In the Experiment at fol. it appears this Engine took a load of [illegible] Tons after it at [illegible] Miles per Hour, now at [illegible] Miles per Hour this Engine would be a [illegible] Horse Power, a horse Power at [illegible] Miles per hour is equal to [illegible] Pounds and
