BOY INVENTORS SERIES
   Stories of Skill and Ingenuity
   By RICHARD BONNER
   Cloth Bound. Illustrated. Price, 50c. per vol., postpaid
   THE BOY INVENTORS' WIRELESS TELEGRAPH.
     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' VANISHING GUN.
     A thought, a belief, an experiment; discouragement, hope, effort and  final success--this is the history of many an invention; a history in  which excitement, competition, danger, despair and persistence  figure. This merely suggests the circumstances which draw the daring  Boy Inventors into strange experiences and startling adventures, and  which demonstrate the practical use of their vanishing gun.
   THE BOY INVENTORS' DIVING TORPEDO BOAT.
     As in the previous stories of the Boy Inventors, new and interesting  triumphs of mechanism 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, and the story of their serious, purposeful inventions challenge  the reader's deepest attention.
   Any volume sent postpaid upon receipt of price.
   HURST & COMPANY--Publishers--NEW YORK