CONTENTS
[How Guglielmo Marconi Telegraphs Without Wires]
[Santos-Dumont and His Air-Ship]
[How a Fast Train Is Run]
[How Automobiles Work]
[The Fastest Steamboats]
[The Life-Savers and Their Apparatus]
[Moving Pictures—Some Strange Subjects and How They Were Taken]
[Bridge Builders and Some of Their Achievements]
[Submarines in War and Peace]
[Long-Distance Telephony—What Happens When You Talk into a Telephone Receiver]
[A Machine That Thinks—A Type-Setting Machine That Makes Mathematical Calculations]
[How Heat Produces Cold—Artificial Ice-Making]