( po ) 
adhere to them without being rubb’d 5 and that is what I 
never took notice ot before. 1 farther obferved, that the 
Rofin, while warm, would attract Leaf-Brafs at an Inch 
or two diftance without any Attrition. But next day 
when I came to repeat the Experiment, its Eledricity was 
fo inconfiderable, as well as that of the Sulphur, that I 
, did not think them worthy to trouble the Society with 
the fight of ’em, alcho the knowledge of their Perfor- 
mances may not be altogether unncceffary. At Night I 
try’d what Light thefe Bodies would afford on their At- 
trition in the Dark, but could produce none from the Ro- 
tin, nor indeed but very little from the Sulphur, and that 
not by my Hand, but by holding the ends of my Nails 
very hard on it while it was in motion. I try’d likewife 
wiiether the Sulphur would emit any Light by its Attri- 
tion in the Dark in Facuo, but could difcover none altho ‘ 
diligently endeavour’d. 
The moft furpiifing of all Experiments that I have 
met with yet, are the following. 
I took my Glafs Globe that I ufe for (liewing, the Ex- 
periment of the included Threads, which would point ' 
every way from the Center to the Circumference upon 
the Attrition of it 5 and in that (fate a Motion might be ; 
given thofe Threads, by the Approach of one’s Hand i 
near its ontfide. But this proceeded from the Effluvia of i 
its own Body exerted by rubbing, therefore not fomuch 
to be wondred at. But that thofe Threads contain’d in j 
the fame Globe, ftiould have motion given them by the i 
Effluvia of an Heterogenious Body feparate from it, and 1 
the Globe at the fame time to have no manner of mo- ^ 
tion or Attrition given it, is very arnafing ^ and that it ^ 
is fo, is matter of faff. For when I held rubb’d Seal- A 
ing Wax near the outfide of the Globe, the Threads ^ 
within would have motion given them in a very afto* 
nifhing manner, altho’ the Body of Wax touch’d not the | 
Glafs by a or 4 Inches. The like I found might be per- 
form’d 
I 
1 
