He then found that he could electrify, by induction, an insulated sphere placed completely in the shadow of a body which screened it from direct action.
He pictured the lines of electric force bending round the edges of the screen, and reuniting on the other side of it; and he proved that in many cases the augmentation of the distance between his insulated sphere and the inducing body, instead of lessening, increased the charge of the sphere.

This he ascribed to the coalescence of the lines of electric force at some distance behind the screen.
Faraday's theoretic views on this subject have not received general acceptance, but they drove him to experiment, and experiment with him was always prolific of results.

By suitable arrangements he placed a metallic sphere in the middle of a large hollow sphere, leaving a space of something more than half an inch between them.

The interior sphere was insulated, the external one uninsulated.

To the former he communicated a definite charge of electricity.