336 A. B. Quinby on Water=Wheels. 
To justify the strictares I offered, it is only necessary te 
attend to the construction of the paragraph quoted. 
In this paragraph it is asserted that, “* There is in the 
steam engine a loss of power, in changing the direction of 
its action from rectilinear to rotary by the method in com- 
mon practice.” This is the first member of the sentence. 
The two next members are not necessary in the examination. 
The fourth member expresses, “ Which on an average a- 
mounts to about three-fourths of the whole power ;” And 
then the author appends the following member. ‘“ As 
[which] appears from the reports of the performance of the 
engines used at the mines in Cornwall.’’ Now, in this sen- 
tence, how much does the author assert on his own responsi- 
bility? and bow much does he give on the authority of 
essrs. Leans? This can readily be determined by par- 
lates to the quantity of the loss ; and all that is expressed in 
mon practice, *, *, *, as [which] appears from the reports of 
walt” ce of the engines used at the mines in Corn- 
Now, it is asked, why did the writer of this rejoinder, and 
of the article in the North American Review, leave out these 
three interposing members of this sentence? Did he think 
the reader so little informed as not to be able to perceive the 
“I do not believe that any such thin , 
‘ ~ tiga appears from Messrs. Lean’s re- 
Qorm, And sess it understood that | merely admit the fact for the sake of 
putting the point in the most fa ; } 
‘fh the North American —— shape for the writer, of theerticls 
