inby on Crank Motion. ; 
“One of Woolf’s double engines at Wheel Fortune 
mine, in May 1816, drew only three million pounds one 
foot high, with each a but another at Wheel Fortune 
mine drew six mil illio 
t two facts, and those 
not the most ihsiutsble to oe: account given in the Revie jew, 
and comparing the highest performance of the rotary en 
gine with the best pumping engine: viz. 11,000,000 wit 
56,000,000, gives the performances as 1 to 5.09,ad 
ence even ad than is nesters 3 in the Rey view. 
crank without loss of force ; is to put down a long series of 
facts so carefully ascertained as those reported by the 
ests. Leans? It is submitted for any unperverted mind 
to judge, whether the paragraph in the Review is not a fair, 
and, on the whole, a natrow statement of the loss, “as ap- 
pears from the reports on the performance of the engines 
used at the mines in Cornwall.” 
C3 
<i 
manner b by which it may be supposed that the author of th 
iew uf aoe these attempts more highly than sey 
deserve. But this is by no means the case. A plaia rela- 
tion of attempts to accomplish : a particular object is e 
and the unsuccessful result of a attempts Is as 
- This was certainly wi he pro ofessed o , 
, ae d'to the writer a ne- 
: that it 1s pet lor Mr. 
ee to the efforts of invention. Iti is f 
Vou, VIEL—No. 2. 16 
