J. 
1 
1 
( 440 ) 
and the Glafs was become pretty warm (at the fame time 
tail of commoii Air) the Hoop of Threads was held 
over it 5 but the Attradion was very inconfiderable on 
the lin’d part, though on the rranfparent fide the Threads 1 
were pretty vigorcuUy directed 5 yet not with that force 
and ftrength, as when the Glafs is perfcdly dear within, ' 
as this was not 5 becaufe the Fumes of the melted Sul- ; 
phur adhering to if, made it appear fomewhat Cloudy. 
A Repetition of the foregoing Experiment with Common 
Sulphur. 
T took a quantity of Common Sulphur, nearly 
equal to what I had ufed before of the Flowers 5 which • 
having melted as before, I pour’d it into ano- 
ther Globe- Glafs, which, I us’d in all Refpeds as the for- ' 
mer. But when I had exhaufted it, and given the ufual ^ 
Motion and • Attrition, the cfFe£l was fo furprizingly dif- 
ferent, that one would fcarce think it (hould proceed . 
from the fame fort of body. For the Figure of ray 
Hand and Fingers appear’d not only on its infide, (tho* 9 
more faint and pale than in the Experiments of Sealing- 9 
wax and Pitch, J but on its outfide there appear’d a brisk I 
Purple Light, fo beautiful and agreeable to the Eye, m 
that it was very pleafant to behold. The Strength of 9 
this Light may be judged from hence, That the Lines of ■ 
the Palm of my Hand, which being near the touching 9 
Parts, were eafily dilcoverable by it ; and were a fmall m 
Print plac’d at the fame diftance, I queftion not but it 9 
would be legible without any great difficulty. And as ^ 
this common Sulphur differ’d vaftly in that part of the 
Experiment already related, .from the former, fo likewife . , 
in the latter 5 for when the Hoop of Threads came to be 'i , 
held over it, (under the fame Circumftances as in the ^ «i 
other J they were dire^ed toward it as vigoroufly as in / ^ 
any Experiment' heretofore made. The Parts lin'd and 1 
