L.. 65. J 
pared with the diameter of the large 
one; by which difference it may 
happen, that the dilation of the air 
Within becomes greater or lefs by 
warmth, as the fubftance of the 
glafs be thicker or thinner, and that 
the capacity of the tube itfelf variés 
for this reafon. The difference of the 
refult, however, can be but very 
{mall from this caufe. 
Thus, by computing the number 
of fub-divifions to which thefe feven 
errors may amount, we find then 
tobe 25. But, as all the five mea- 
{ures of airs are let up in the large 
tube one after another, thefe errors 
may, if they were all committed, 
amount to five times this se 
or to 425 fub-divifions. 
The miftakes depending frorti the 
great tube,* or meafure, may” alfo 
amount to {even Heads? =e 
M 3 . The 
*- 
