These effects are, as we shall see, partly states of electrification on the surface or distributions of electric current in wires or rods, and partly conditions in the space outside them, which we are led to recognise as distributions of electric strain and of an associated effect called magnetic flux.
"Hertzian Wave Wireless Telegraphy"
John Ambrose Fleming
Friction or pressure produces strong electrification; thus the stones may be electrified by shaking a few together in a bag, or by the tumbling of the powdered stone-grains over each other as they roll down a short inclined plane.
"The Chemistry, Properties and Tests of Precious Stones"
John Mastin
The move towards rural electrification was a popular one across the nation, cited continually as the one item most useful to the farmer for advancing mechanization and of greatest importance in raising the farm family's standard of living.
"Frying Pan Farm"
Elizabeth Brown Pryor