| The Drop Forge—Forging a Steel Plate |
Frontispiece |
| |
FACING PAGE |
| Raising Water with a Chain of Pots—a Primitive
Pump Used in Egypt |
32 |
| Horse-Operated Chain Pump Used in Greece |
32 |
| Multiple Spindle Drill in a Motor Car Factory |
33 |
| Bucket of a Giant Dredge with Its Jaws Wide Open |
64 |
| Gold Dredge Eating Its Way Through River Sands |
65 |
| Suction Dredge Excavating a Channel and Building
New Land |
65 |
| Air Lock of a Pneumatic Caisson |
96 |
| Subaqueous Tunnel Showing the Shield in the
Background |
97 |
| Wharf Protected by a Pneumatic Breakwater |
128 |
| Sun-Power Plant in Egypt |
129 |
| Close-Up of One of the Reflectors of a Sun-Power
Plant |
129 |
| Giant Caproni Hydroaeroplane |
160 |
| Concrete Steamship “Faith” |
161 |
| “Virginian,” the Largest Locomotive in the World |
161 |
| Loom Provided with a Jacquard Attachment |
224 |
| Battery of Mule Spinning Frames |
225 |
| Jacquard Attachment for Loom |
225 |
| Digging a Trench with a Machine of the Chain
Type |
256 |
| Multiple Plowing on a Western Wheat Field |
257 |
| Sawing Logs of Pulpwood into 16-Inch Lengths |
288 |
| Heater in a Pulp Mill Where the Wood Pulp Is
Mixed with Clay |
288 |
| Modern Fourdrinier Paper-Making Machines |
289 |
| Molten Metal from a Blast Furnace |
320 |
| Bessemer Converter Blowing Air Through a Mass
of Molten Iron |
320 |
| Steel Beam Passing Through the Finishing Rolls |
321 |
| Compositor at Work on a Linotype Machine |
352 |
| The Optophone, Which Enables the Blind to Read
Print |
353 |
| Blind Man Reading with His Ears |
353 |