C 482 ] 
I had before obferv’d, that, altho’ * Non-eJe&ric 
Bodies, made electrical, lofe almoft all that Electri- 
city, by coming either within or near the ContaCt of 
Non-eleffrics not made eleftrical. It happens other- 
wife with regard to Eleffirics per fe, when excited 
by rubbing, patting, &c. j becaufe from the rubbed 
Tube I can fometimes procure five or fix Flafhes from 
different Parts 5 as though the Tube of two Feet 
long, inftead of being one continued Cylinder, con- 
fided of five or fix feparate Segments of Cylinders, 
each of which gave out its Electricity at a different 
Explofion. 
The Knowlege of this Theorem is of the utmofl 
Confequence towards the Succefs of electrical Ex- 
periments ; inafmuch as you muft endeavour, by all 
poffible means, to collect the Whole of this Fire at 
the fame time. Profeffor Hollman feems to have 
endeavour’d at this, and fucceeded, by having a tin 
Tube 5 in one End of which he put a great many 
Threads, whofe Extremities touch’d the Sphere when 
in Motion, and each Thread collected a Quantity of 
electrical Fire, the Whole of which center’d in the 
tin Tube, and went off at the other Extremity. 
Another thing to be obferved is, to endeavour to 
make the Flafhes follow each other fo faft, as that a 
fecond 
4 I call Eleltrics per fs, or originally Electrics, thofc Bodies, in which an 
attradtive Power towards light Subftances is eafily excited by Fridtion ; filch 
as Glafs, Amber, Sulphur, Sealing-wax, and molt dry Parts of Animals, as 
Silk, Hair, and fuch-like. I call Non-elelirics, or Condudtors of Eledfricity, 
tbofe Bodies, in which the above Property is not at all, or very flightly per- 
cept.b'ej fuch as Wood, Animus living or dead, Metals, and vegetable Sub- 
ftances. See Gray, Du Fay, Defaguliers, Wbeler, in the Philofiphical 
Transitions, 4.17. 412, 423. 431. 436, 439, 444, 4/3. 4/4, 460. 
462. 4^4. 
