CHAPTER I.
CELLS AND BATTERIES.
1. Carbon-Zinc Cell. Fig. 1. If you have some rubber bands you can quickly make a cell out of rods of zinc and carbon. The rods are kept apart by putting a band, B, around each end of both rods. The bare wires are pinched under the upper bands. The whole is then bound together by means of the bands, A, and placed in a tumbler of fluid, as given in [App. 15]. This method does not make first-class connections between the wire and rods. ([See § 3.])
Fig. 1.