five years, render the dreams, speculations and guesswork of the past absurd. The little we know in a practical way is more than all the philosophers of the past knew from Aristotle to Leibnitz."

Prof. Langley, in his address at the 1902 session of the American Association of Science, stated that, "up to 1872 it was almost universally believed that there were three different kinds of energy—actinic, luminous and thermal—represented in the spectrum;" but he affirmed: "There is only one radiant energy which appears to us as actinic, luminous or thermal, according to the way we observe it.

"Heat and light are not things in themselves, but different sensations in our bodies, or different effects in other bodies. They are merely effects of this mysterious thing we call radiant energy." He thus sustains my position and the electric theory of creation, which is, that there is but one universal and ultimate energy which he calls radiant and I call electric energy, and which are the same thing.