By CHARLES R. GIBSON, LL.D., F.R.S.E.

“Mr. Gibson has fairly made his mark as a populariser of scientific knowledge.”—Guardian.

“Mr. Gibson has a fine gift of exposition.”—Birmingham Post.

MODERN ELECTRICAL CONCEPTIONS. Illustrated. 12s. 6d. nett.

In the Science of To-Day Series. Illustrated. 6s. nett each.

SCIENTIFIC IDEAS OF TO-DAY. A Popular Account of the Nature of Matter, Electricity, Light, Heat, &c. &c.

ELECTRICITY OF TO-DAY.

WIRELESS OF TO-DAY. By Charles R. Gibson, F.R.S.E., & W. B. Cole.

In the Romance Library. Illustrated. 6s. nett each.

THE ROMANCE OF MODERN ELECTRICITY.