With two other wires connect the two copper plates with the galvanoscope binding-posts, and watch for any indication of current.
To test the voltage of batteries we must be able to control our galvanoscope.
Broadly speaking, a galvanoscope is an instrument that detects the presence of electric currents.
The galvanoscope merely indicates the presence of a current.
The galvanoscope may also be put into the circuit as in Fig. 113.
Fig. 62 shows how the connector should be slipped upon a thin piece of metal, M, like that on the galvanoscope, for example.
At this moment the circuit of the galvanoscope, K, is closed, and we ascertain whether there is a deviation of the needle.
On account of the peculiar arrangement of the legs, the galvanoscope can be made to stand firmly, even upon uneven surfaces.
The older or moving-magnet type of galvanometer is similar to the galvanoscope mentioned in Art. 239.
To study the lines of force about a coil of wire like that upon the galvanoscope.