LIST OF ILLUSTRATIONS
| A Huge Lamp | [Frontispiece] |
| facing page | |
| First Effect of the Dynamite | [16] |
| A Fine Crop | [24] |
| Apple-tree planted by Spade | [48] |
| Machine-made Ice | [72] |
| A Cold Store | [80] |
| Dassen Island Lighthouse | [88] |
| Measuring Heat | [128] |
| The Telewriter | [184] |
| A Miners' Rescue Team | [208] |
| Pneumatic Hammer Drill | [216] |
| An Artificial Coal Mine | [224] |
| Sectional view of a 60-pounder Gun | [232] |
| Rifles of different Nations | [240] |