Telephone Receiver
A Machine That Thinks--A Type-Setting Machine That Makes
Mathematical Calculations
How Heat Produces Cold--Artificial Ice-Making




LIST OF ILLUSTRATIONS


Marconi Reading a Message _Frontispiece_

Marconi Station at Wellfleet, Massachusetts
The Wireless Telegraph Station at Glacé Bay
Santos-Dumont Preparing for a Flight
Rounding the Eiffel Tower
The Motor and Basket of "Santos-Dumont No. 9"
Firing a Fast Locomotive
Track Tank
Railroad Semaphore Signals
Thirty Years' Advance in Locomotive Building
The "Lighthouse" of the Rail
A Giant Automobile Mower-Thrasher
An Automobile Buckboard
An Automobile Plow
The _Velox_, of the British Navy
The Engines of the _Arrow_
A Life-Saving Crew Drilling
Life-Savers at Work