13 JUNE 1914, Page 25

Gearing. By A. E. Ingham. (Methuen and Co. Cs. net.)

—This eminently practical treatise aims at presenting in a simple form the general scientific principles which underlie the subject of mechanical gears and their application. It also gives particulars of the most approved methods of solving problems associated with spur, bevel, worm, spiral, and helical gears.