CONTENTS.
| CHAPTER I. The Tools,Machines, and other Appliances used in Rock Blasting. | |
| PAGE | |
| Section I. Hand-boring Tools.—Drills. Hammers. Auxiliary Tools. Sets of Blasting Gear | [1] |
| Section II. Machine-boring Tools.—Machine Rock-drills. Borer-bits. Drill Carriages | [23] |
| Section III. Appliances for firing Blasting Charges.—Squibs. Safety Fuse.Electric Fuses. Cables. Detonators. Electric Firing-Machines | [42] |
| CHAPTER II. Explosive Agentsused in Rock Blasting. | |
| Section I. Phenomena accompanying an Explosion.—Nature of an Explosion. Heatliberated by an Explosion. Gases generated by an Explosion. Force developed by an Explosion | [64] |
| Section II. Nature of Explosive Agents.—Mechanical Mixtures. Chemical Compounds | [76] |
| Section III. Relative Strength of the common Explosive Agents.—Force developedby Gunpowder. Relative Force developed by Gunpowder, Gun-cotton, and Nitro-Glycerine | [88] |
| Section IV. Means of firing the common Explosive Agents.—Action of Heat. Detonation | [92] |
| Section V. Some Properties of the common Explosive Agents.—Gunpowder,Gun-cotton, Dynamite. Firing Temperatures | [97] |
| Section VI. Some Varieties of the Nitro-Cellulose and the Nitro-GlycerineCompounds.—Nitrated Gun-cotton. Tonite, or Cotton-Powder. Schultze’s Powder. Lithofracteur.Brain’s Powder. Cellulose-Dynamite | [103] |
| CHAPTER III. The Principles of Rock Blasting. | |
| Line of least Resistance. Force required to cause Disruption. Conditions of Disruption.Example of a Heading. Economical Considerations. Tamping | [106] |
| CHAPTER IV. The Operations ofRock Blasting. | |
| Hand Boring.—Boring the Shot-holes. Charging the Shot-holes. Firing the Charges | [128] |
| Machine Boring.—Boring the Shot-holes. Charging and Firing. Removing the dislodged Rock.Division of Labour | [142] |
| Examples of Drivings.—The St. Gothard Tunnel. The Hoosac Tunnel. The MusconetcongTunnel. Headings at Marihaye, Anzin, and Ronchamp | [157] |
| CHAPTER V. Subaqueous Blasting. | |
| Preparation of the Charge. Boring under Water. Submarine Rocks. Obstructions in Water-courses | [164] |
ROCK BLASTING.