Fig. 213. LEYDEN JAR WITH DISCHARGER.
If one or more persons act as discharging conductors they will receive a
shock. This is done by their joining hands, a person at one end touching
the outer coating and another person at the other end touching the knob.
From an influence machine a charge can be taken by connecting the
coating to one electrode and the knob to the other.
Fig. 214. SULPHURIC ACID LEYDEN JAR.