Reply to Mr. Quinby on Crank Motion. 279 
nearly the same length as that of the clock. The remedy 
iseasy: merely to conduct the cord of the weight to a 
difierent support from that which sustains the gens: um. 
» XIX.—Reply to Mr. Quinby on Crank Motion. 
TO PROFESSOR SILLIMAN. 
a 
Iy a note to an article on “ Crank Motion,” published 
the last number of the American Journal, Mr. Quinby, nid 
author of that article, says: “Since I wrote the above solu- 
tion, I have learned that the North-American Review con- 
tains an article in which it is stated that the crank mo 
ecgunte aloss of three fourths of the whole power n 
ed!! : 
*On referring to the article alluded to, I find the Sollee 
Statement relative to the loss of power supposed to result from 
the reciprocating motion produced by the erenk.” Mr. Quin- 
by then quotes the words of the Review as follows: ** There 
isin the steam engine a loss of power in changing the di- 
, a of its action ices rectilinear to rotary, Mies the meth- 
3 in 
wigs. mech banieat v.. nt 
an be inferred ia 
