4x>8 Mr. de Luc on 
88. I muft, however, firft explain another reduction that I 
have added to the former. In the firft table which I have 
given of thofe experiments, I followed the immediate divifion 
of my iuftruments, in which o correfponds to extreme drynefs, 
and 100 to extreme moifture . But firft, under that form, the 
point called ioo by M. de Saussure would not appear in its 
true light, as it means the greateft length of the hair ; while 
the point ioo of my fcale defigns the ftate of that thread in 
water , where it has a little retrogradation . Under that form 
alfo moft part of the terms in the obfervation on the box thread 
would be negative , fince it moves very long in a contrary direc- 
tion to the other hygrofcopes. For thefe reafons, iuftead of 
calling o the point of extreme drynefs , and that of extreme moif- 
iure ioo, I have, in the following tables, applied the firft of 
thofe denominations to the fmalleft length of each fubftance, 
and the laft to their greatejt length . That reduction produces 
no difference in the proportions between the terms, and none in 
the terms themfelves in refpeft to Jlips\ as in thefe, th t greateft 
length is always obferved by extreme moifture , and the fmalleft 
by extreme drynefs . 
II. Table 
