Electrification

Proce of producing in any body a so called electric charge. The electrification developed on gla when it is placed in contact with silk has been arbitrarily called "vitreous" or positive; and that appearing on sealing-wax after it has been in contact with flannel is called resinous or negative. All electrification is one or the other of these two kinds. Any two heterogeneous substances when brought in contact with each other are oppositely electrified, and the one which is positively electrified is said to be electropositive to the other, which is electronegative. Thus electric substances may be arranged in a series such that each is electropositive to those that follow it, but electronegative to all that precede it.