98° Ward’s Steam-Engine. 
The first of these notions, I think I have already disproved ; 
and that the — is manent founded in error, I must be al- 
lowed the boldness to aver. 
Se eecanticiann: have computed this loss at #4; of the pow- 
er used, But, in estimating the effect produced, they seem 
to have lost sight of the power consumed. In comparing 
the effects produced, when the steam is made to act, at all 
points, wholly in the direction of the tangents at those points, 
that is, at right angles to the crank, with the effects produ- 
ced, when, as in the common mode of applying the crank, 
the direction of the force is at an angle to it, continu ly va- 
rying from a right angle to a coincident line, men of science 
appear never to have considered, that, where the force is al- 
ag re gh as in the first instance, at right angles to the 
rae. as in te et a perpetual ly ake! angle 
th of pisto ded is equal to the d 
levenths 
of power are ae but that foursbleveinlie’ aoa a are 
consumed. 
_ The same truth may be demonstrated in another way. 
Sabon oe force to be applied in the tangents of a circle, 
the semicircumference of which is equal to the diameter of 
that which is described by the crank. Then, of course, the 
eth of piston-rod- during the semi-revolution 
of this reduced circle, is rosenh a the erat sh pt when 
the crank is used ; and the quantities of power cons consumed in 
each will be equal. That the effects p 
qual, anor be shown cc Sages 
