"I often say that when you can measure what you are speaking about, and express it in numbers, you know something abou…"

"There cannot be a greater mistake than that of looking superciliously upon the practical applications of science. The…"

"Quaternions came from Hamilton after his really good work had been done, and though beautifully ingenious, have been …"

"I am afraid I am not in the flight for “aerial navigation”. I was greatly interested in your work with kites; but I h…"

"Symmetrical equations are good in their place, but 'vector' is a useless survival, or offshoot from quaternions, and …"

"Mathematics is the only true metaphysics."

"Do not imagine that mathematics is hard and crabbed, and repulsive to common sense. It is merely the etherealization …"

"I need scarcely say that the beginning and maintenance of life on earth is absolutely and infinitely beyond the range…"

"It is conceivable that animal life might have the attribute of using the heat of surrounding matter, at its natural t…"

"Tesla has contributed more to electrical science than any man up to his time."