[ I0 3 3 
{ton to an aftonifhing Degree. To this End I pro- 
cured three cylindrical Phials blown very thin, about 
feventeen Inches in Height and four in Diameter : 
After thefe were coated within an Inch of their 
Necks with Sheet-Lead, I put into each fifty Pounds 
of leaden Shot. I chofe this Form for the Glades, 
that the Matter therein contained might be expofed 
under as large a Surface, as could conveniently be ob- 
tained. Thefe Glades were placed near each other in 
a convenient Part of my Room, and did communi- 
cate with each other by means of a fmall iron Rod 
lying upon all their Mouths, and touching Pieces of 
drong Wire duck into the Shot contained in them : By 
this Management one of thefe could not be cleCtrifed 
without communicating with the red. The leaden 
Coatings of thefe Glades wercalfo connected together 
by fmall Wires, all which center'd in one tail Wire ; 
fo that, when the Matter contained in thefe three 
Glades was replete with Electricity, which was done 
by a Wire from the Gun-barrel fadened to the iron 
Rod lying upon their Mouths, the whole Quantity 
of Electricity here accumulated might be difeharged 
at once by touching the Gun-barrel with an iron 
Rod fadened to the tail Wire. When the Glades 
are diffidently eleCtrifed, if the Room is dark, you 
will fee Brufhes of blue Flame from feveral Parts of 
the conducting Wire; and thefe indicate the proper 
Time of making the Explodon. Thefe Glades, from 
the Thinnefs of their Sides, and from .the Weight 
of their leaden Shor, are very liable to burd ; and 
if one of them happens to have the lead Crack in 
any Part of its Surface, which is under the Lead, 
none of them can be eleCtrifed ; all the Electricity 
pa ding 
v 
