The Speed Factor in Collisions, Bigger Lifeboats for Ocean Liners and more

Teaching from the Child's Point of View

A New Science Created

The Vast Ore Deposits of Cuba, Treating Tuberculosis by Marine Micro-organisms and more

For illustrations see pages 146 and 147

Fighting in the Air, The Current Supplement and more

Buying and Selling Silver and Gold

The Scientific Side of the Assay Office at New York

Improvised Forge

A Variable Speed Groove-pulley

Cutting Keyways in a Lathe

Lineman's Clamp from a Buggy Top, Workshop Notes

Construction of a Water-tight Box

Expanding Socket for Screw Spikes, A New Noiseless Gear for Motor Cars and more

Flashlight Signaling for Railways

By Our English Correspondent

Large List of Prizes in 1914 Rubber Exhibit