REPORT OF THE COMMITTEE ON MANUFACTURES. 15 



the cylinder traversed by the movable head is saved. The mov- 

 able heads are comiected by parallel rods on the outside of the 

 cylinder, and are held at their stationary points by a ratchet arrange- 

 ment. The object of the inventor is to apply the steam to the 

 piston only during the half of the stroke when it has the quickest 

 motion; it is evident that this arrangement would require the 

 momentum of a heavy fly-wheel to carry the crank through a portion 

 of its path, even when the engine was doing no work; to remedy 

 this defect, the inventor proposes to use two cylinders of the kind 

 described, having their cranks at right angles. The movable heads 

 being packed, and having connecting rods passing through stuffing 

 boxes, may be regarded as pistons in estimating the friction of this 

 engine. Admitting that the machine can be made to work practi- 

 cally, a plain statement of the proposed improvement is, the, substitu- 

 tion of two cylindei's and six pistons for one cylinder and one piston. 



The crank is admirably adapted to the reciprocating piston, the 

 dead points being precisely where the piston must change its direc- 

 tion, and the leverage of the crank increasing and decreasing directly 

 as the velocity of the piston, there is no loss of steam ; consequently 

 no loss of power except in friction. That the sum of friction is less 

 in the RowelFs complicated arrangement is not demonstrated. Your 

 committee, therefore, while admitting its ingenuity, cannot commend 

 it as a useful improvement. 



Respectfully submitted. JOHN D. WARD, 



JOSEPH DIXON, 

 SAM'L D. TILLMAN, 

 JAS. L. JACKSON, 



New York, January 7, 1863. Committee. 



