The world may be utterly crazy

is an electromagnetic disturbance in the form of waves propagated through the electromagnetic field according to electromagnetic laws.

we can scarcely avoid the conclusion that light consists in the transverse undulations of the same medium which is the cause of electric and magnetic phenomena

the only laws of matter are those which our minds must fabricate, and the only laws of mind are fabricated for it by matter.

This velocity is so nearly that of light, that it seems we have strong reason to conclude that light itself

The mathematical difficulties of the theory of rotation arise chiefly from the want of geometrical illustrations and sensible images, by which we might fix the results of analysis in our minds.

I have also cleared the electromagnetic theory of light from all unwarrantable assumption, so that we may safely determine the velocity of light by measuring the attraction between bodies kept at a given difference of potential, the value …