t 5 2 5 ] 
“ que disjiciente. Difceffiones autem vel igne pro- 
ec prio corporum effieiuntur fe expandente contra 
cr aereum, vel aereo fe expandente valentius contra 
tc propriumj” quae tamen expanfio ignis alterius al- 
terutn fuperantis fine mixtione mutua alterius cum 
altero videtur contingere. Aer enim ignem continet 
fuum quantuncumque, ne difcedatj arcet proprium 
deferentium corporum ignem, ne adhaerefcat fibi. 
29. Hanc, inquam, hypothefim offero tibi, vir prae- 
clariffime, quo tu earn facias meliorem. Si tanti in- 
terea ipfam ducas, lit Regia? ifti fcientiarum Societati 
exhibenda videatur, res ex meo obtinget defiderio, 
qui quando ornamentum ipfi adferre nullum polfum, 
diligentiam faltem nolim defiderari meam. Tu vero 
cura, ut valeas. Servari enim te decet quam diutil- 
lime utiliflime, fcientiae perficiendae amplificandae- 
que, quam certiffimam inftituifti. Dat. Taurini, 
24 Decembris, 1757. 
Remarks o?t the preceding Paper , by Benja- 
min Franklin, L. L. Z). F. R. S. 
Read Feb. 14, pOR the better understanding this pa- 
1760. jp ncce {p ar y t0 know, that 
Father Beccaria ufes a large chain, fufpended by filk 
lines, for the purpofe of a prime conductor ; and that 
his machine for turning the glafs globe is fo con- 
trived, as that he can, on occafion, readily ifolate it, 
(i. e. place it on glafs or wax) together with the per- 
fon that works it. When the communication is thus 
cut off between the earth and the chain, and alfo 
between the earth and the machine, he obferves, 
that the globe being turned, both the chain and the 
Y y y 2 machine 
