Mathematics is the most exact science, and its conclusions are capable of absolute proof. But this is so only because mathematics does not attempt to draw absolute conclusions. All mathematical truths are relative, conditional. In E. T. Bell Men of Mathematics, New York: Simona and Schuster, 1937.

I have succeeded in getting my actual work down to thirty minutes a day. That leaves me eighteen hours for engineering.

Scientific theories need reconstruction every now and then. If they didn't need reconstruction they would be facts, not theories. The more facts we know, the less radical become the changes in our theories. Hence they are becoming more and more constant. But take the theory of gravitation; it has not been changed in four hundred years.

Mathematics is the most exact science, and its conclusions are capable of absolute proof. But this is so only because mathematics does not attempt to draw absolute conclusions. All mathematical truths are relative, conditional. In E. T. Bell Men of Mathematics, New York: Simona and Schuster, 1937.

Electricity is doing for the distribution of energy what the railroads have done for the distribution of materials.

No man really becomes a fool until he stops asking questions.

Marking dynamos for repair $10,000.00-2 hours labor $10.00; knowing where to mark $9,990.00.