258 On the Measure of Moving Force. 
In objecting to the opinions of many eminent 
‘writers on mechanics, I have ventured much. 
Although this has not been done inconsider- 
ately, Iam sensible there are in the arrange- 
ment of my arguments some faults, and others 
which have escaped my observation, will no 
doubt occur to the reader. But if my endea- 
vours to make this essay more free from im- 
perfections than it is, had been successful, it 
would still be unreasonable to expect it to 
obtain more attention than has been paid to 
the arguments of the illustrious men who have 
preceded me in the same track of investiga- 
tion. If I have succeeded so far only as 
to show, that the prevailing doctrines of 
force, especially in their application to practi- 
cal purposes, involve some difficulties which 
are unexplained ; and if I have offered any 
inducement to men of science to reexamine 
this question, my chief object will in a great 
measure be accomplished. 
_ Errata. 
Page Line. 
116 27 for “ EandC,” read “ P and Q” 
121 21 for“ and when,” read “and, if FH and #1 be 
taken each =1EF, when” 
123 15 after “ right angles” insert “ and if AC=AB” 
150 17 for effect, &c.” read “effect of a given quantity 
of water must consequently be as c?” 
176 12 for “ force acting at,” read “ pressure ‘acting 
through a small space at’ 
176 14 for “ DH will he,” read “and if DH represent” 
215 ~— 8 of the Note, for “‘ theory” xead “ theoretical mea- 
sure of force.” 
