5. Carbon-Zinc Cell. Fig. 4. The general construction of this cell is the same as that of [App. 3]. There are 2 carbons, C, each 4 × ½ in. The holes for these are bored in A 1¼ in. apart, center to center. The zinc rod, Z, is a regular battery zinc, 6 × ⅜ in., and has a binding-post, Y, of its own. The rods, C, are held in A, and connections are made as explained in [App. 3].
Fig. 4.
The wire, X, is fastened direct to the strips, B, as shown. When ready to use this cell, be sure that the wire connecting the carbons does not touch Z. (Why?) The other wire is connected to Y. The wooden piece is 4½ × 1 × ½ in. Use the battery fluid of [App. 15] in a tumbler. This cell will run small motors, and is good for induction coils, etc. ([See § 3].)
