By RICHARD BONNER

Cloth Bound. Illustrated. Price, 50c per vol., postpaid

The Boy Inventors’ Wireless Triumph

Blest with natural curiosity,—sometimes called the instinct of investigation,—favored with golden opportunity, and gifted with creative ability, the Boy Inventors meet emergencies and contrive mechanical wonders that interest and convince the reader because they always “work” when put to the test.

The Boy Inventors and the Vanishing Gun

A thought, a belief, an experiment; discouragement, hope, effort and final success. This too is the history of the daring Boy Inventors.

The Boy Inventors’ Diving Torpedo Boat

As in the previous stories of the Boy Inventors, new and interesting triumphs of mechanisms are produced which become immediately valuable, and the stage for their proving and testing is again the water. On the surface and below it, the boys have jolly, contagious fun.

The Boy Inventors’ Flying Ship