-He" is digging the shaft, guided by that instinct to 
Sik aaa 
184 Faraday as a Discoverer. 
discharges of his large Leyden battery. This, if concentra. 
in a single discharge, would be equal to a very great ert 
lightning; while the chemical action of a single grain of watt 
on four grains of zinc would yield electricity equal in beer 
to powerful thunderstorm. Thus his mind rises from them” 
nute to the vast, expanding involuntarily from the smallest ™ 
oratory fact till it embraces the largest and grandest i 
phenomena.* i : 
In reality, however, he is at this time only clearing re 
and he continues laboriously to clear it for some time ge ap 
* Buff finds the quantity of P : milligram of BY : 
: electricity associated with one MNNEY ate 
—> water, to be equal to 45 480 Siene of a Leyden jar, with it 
salons otres; and & diameter of 160 millimetres. Weber and Kohl oo 
dr ated that if the quantity of electricity associated one metres aoe 
< over a clou height of 1,000 me city at 
the earth, it would exert Upon an equal quantity of the opposite electri Moa 
: a force of 2,268,000 kilograms.—Llectrol 
