If we consider a very small conductor charged with a unit of positive electricity to be placed in an electric field, it will move or tend to move under the action of the electric force in a certain direction.
Because the friction between the hand and fur produces an excitation of positive electricity in the hand and negative in the fur, and an interchange of the two causes a spark, with a slight noise.
It is now pretty generally accepted that an atom of matter consists of a number of electrons, or charges of negative electricity, held together by a charge of positive electricity.
We picture an atom as a sort of miniature solar system, the electrons (particles of negative electricity) rotating round a central nucleus of positive electricity, as described in the text.
Thus the upper air loses a proportion of positive electricity, or becomes "negatively electrified.
We are thus led to the conclusion that the conductivity of the gas is due to electrified particles being mixed up with the gas, some of these particles having charges of positive electricity, others of negative.
There must therefore be some equivalent of positive electricity, but whether this exists in the form of a sphere or in separate particles we have no definite knowledge.
Of course there is the other part, of which I am forbidden to speak--the part which man vaguely describes as positive electricity.
To one of these they gave the name positive electricity, and to the other negative electricity.
There is doubtless a corresponding amount of positive electricity, but so far we have no evidence of its nature.
From all my studies of atmospheric electricity, and from some experiments made specially, it follows that the condensation of vapours is the origin of this development of positive electricity.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "positive electricity" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
