One wire, A, is fastened to T directly, or by a spring binding-post.
To a child in confinement its mother's knee is a binding-post.
On starting, the switch H is turned to complete the connection between one binding-post P and the field-coils.
Strips B and C, folded in half, and punched near the ends, form the binding-post plates.
Make three binding-post plates out of folded pieces of tin, similar to plates B and C, in Fig. 182.
Figures 181 and 182 show how to mount the lever and binding-post plates upon the switch base.
Pass the wire around the screw in Z, and bring its free end to the other binding-post, Y, to be fastened (Fig. 96).
Fig. 64 shows the method of connecting with the special form of binding-post used, for example, upon the resistance coil, R C.
If the deflections are opposite, the point that has the same potential as binding-post, 2, must be between the two points touched.
Do not join the other end to the other binding-post, Zn, of the zinc plate.