Any attempt by the writer of this article to trace the progress of
electricity would be but a vain repetition, after the admirable manner
in which the subject has been treated in a former paper of this series
by Professor Elihu Thomson.
We can only once more emphasize the fact that it is by the union of
four separate classes of minds—scientific discoverers, inventors,
engineers, and capitalists—that this vast new industry has been
created, which gives direct employment to thousands, and, as Bacon said
300 years ago, has “endowed the human race with new powers.”