C 166 ] 
weighing without its Armour jufi: an Ounce, 
and with the Armour, Cramps, and Rings, 1 
Ounce 17 Peny weights, lifted, before the Prelt- 
dent of the Society , on Friday the 27th of July 
1745, 6 Pounds and 10 Ounces Troy Weight. 
This Magnet confided of 3 Plates of Steel, 
each 2 Inches long, 7 Tenths of an Inch in 
Breadth, and not above 6 Hundreths of an Inch 
in Thicknefs: They were laid flat upon each 
other, and ferewed together by 2 fmall Brafs 
Screws going through the 3 Plates. After which, 
the little Parallelopipcd Block fo made np, was 
armed with Iron at the 2 Ends, cramped toge- 
ther with Silver, and fitted with a double Ring 
of the fame Metal, for the convenient holding 
of it. 
IX. AbjlraB of what is contained in a Book con- 
cerning Electricity, juft publifhed at Leipzic, 
1 744. by John Henry Winder, Greek and 
Latin Profellor there \ from Article 75 to 
Article 79. 
Read Nov. 2z. ^ | "‘HE electrical Sparks from Metals, fuch 
1744 JL as E° n anc * Silver, are capable of 
kindling all fuch Fluids as may be otherwife kindled 
by aCtual Flame. And this Experiment fucceeds bed, 
when the quinta Effentia vegetabilis is held in a 
Spoon under the Crofs of a Sword, whofe Point is 
turned towards the electrifying Glafs (Tab. II. Fig. 4.). 
In like manner, the fame Spirits may cafily be let on 
Fire, 
