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PHILOSOPHICAL 
TRA N S A CTIONS, 
I. Of the Methods of manifefiing the Prefence, and afeertaining 
the Quality, of finall Quantities of Natural or Artificial 
Eledlricity . By Mr. Tiberius Cavallo, F. R. S. 
The Le&ure founded by the late Henry Baker, Efq. F. R. S. 
Read November 15, 1787* 
T HE perfevering induftry of many ingenious perfons in 
the philofopbical world, mice the beginning of the 
prefent century, has gradually, and with rapid fuccefs, exa- 
mined the effects, afeertained the properties, and inveftigated 
Vol. LXXVIII. B the 
