[ 730 ] 
otherwife is general, is particularly determined to 
the Floor. 
54. Before I proceed farther, I mu ft beg Leave to 
explain what I call the Accumulation of Electricity. 
To put a fimilar Cafe: As we take it for granted, 
that there is always a determinate Quantity of At- 
mofphere furrounding the terraqueous Globe, we 
conceive, when we fee the Mercury in the Barome- 
ter very low, that there then is a lefs accumulated 
Column of this Atmofphere impending over us, 
than when we fee the Mercury high. In like man- 
ner when we obferve that the electrified Gun-barrel 
attracts or repels only very light Subftances at a very 
fmall Diftance, or that the Snap and Fire there- 
from are fcarcely perceptible 5 we conceive then a 
much lefs Quantity of electrical Atmofphere fur- 
rounding the Gun-barrel. This Power being more 
or lefs, we call the greater or lefs Degree of the 
Accumulation of Electricity. This is only attain- 
able to a certain Point, if you electrify ever fo long* 
after which, unlefs otherwife directed, the Dillipa- 
tion thereof is general. The Phial of Water of 
Mufchenbroek feems capable of a greater Degree of 
Accumulation of Electricity, than any thing we are 
at prefent acquainted with : And we fee, when, by 
holding the Wire thereof to the Globe in Motion, 
the Accumulation being complete, that the Sur- 
charge runs off from the Point of the Wire, as a 
Brufh of blue Flame. A Method has been difeo- 
ver’d here by a Gentleman (Mr. Canton ) by which 
the Quantity of accumulated Eleftricity may be mea- 
fured to great. Exa&nefs. The Manner of meafuring 
is this: When the Phial is fufficienrly eledrified by 
applying 
