268 On the Transverse Strain, 
tremity of the piece of wood on which the 
experiment was to be made, and was con- 
stantly stretched by one considerable weight. 
The piece of wood with the tin at its side was 
then made perfectly straight, and its length 
was obtained by noticing with great care, 
what division on the graduated extremity of 
the tin, corresponded with a point at the loose 
end of the wood. ‘The piece was then bent 
on the curve above described, and the length 
of the side to which the tin was nailed, ( whe- 
ther the side was extended or contracted) 
taken as before. ‘The tin closely touched the 
side of the wood in every part, and hence 
served as a fair measure of its length, and 
the difference of the two measures just des- 
cribed, must give the increment or decre- 
ment of the side: to obtain which, the results 
of our experiments are as under : 
Yellow Pine, each piece nine feet long, and 
one inch deep. 
Inch. 
First Expt.—Increment of the outer fibre.........+++ 25 
Do. when piece reversed, or 
when the side which was first 210 
contracted became extended... 
Mean increment,...+...0. «2125 
Decrement of the inner fibre, or i yh 
contraction of that side,..,..)2 ° 
