Mercury
Fulminate--Cap Composition--Table for Correction of Volumes of Gases, for
Temperature and Pressure

CHAPTER VIII.--FIRING POINT OF EXPLOSIVES, HEAT TESTS, &C.

Horsley's Apparatus--Table of Firing Points--The Government Heat Test
Apparatus, &c., for Dynamites, Nitro-Glycerine, Nitro-Cotton, and
Smokeless Powders--Guttmann's Heat Test--Liquefaction and Exudation Tests--
Page's Regulator for Heat Test Apparatus--Specific Gravities of
Explosives--Will's Test for Nitro-Cellulose--Table of Temperature of
Detonation, Sensitiveness, &c.

CHAPTER IX.--THE DETERMINATION OF THE RELATIVE STRENGTH OF EXPLOSIVES.

Effectiveness of an Explosive--High and Low Explosives--Theoretical
Efficiency--M.M. Roux and Sarrau's Results--Abel and Noble's--Nobel's
Ballistic Test--The Mortar--Pressure or Crusher Gauge--Calculation Volume
of Gas Evolved, &c.--Lead Cylinders--The Foot-Pounds Machine--Noble's
Pressure Gauge--Lieut. Walke's Results--Calculation of Pressure Developed
by Dynamite and Gun-Cotton--McNab's and Ristori's Results of Heat
Developed by the Explosion of Various Explosives--Composition of some of
the Explosives in Common Use for Blasting, &c.

INDEX

LIST OF ILLUSTRATIONS.

FRONTISPIECE--Danger Building showing Protecting Mounds.
1. Section of Nitro-Glycerine Conduit
2. Melsens System of Lightning Conductors
3. French System
4_a_ & 4_b_. English Government System
5. Upper Portion of Nitrator for Nitro-Glycerine
6. Small Nitrator
7. Nathan's Nitrator
8. Nitro-Glycerine Separator
9. Nitro-Glycerine Filtering Apparatus
10. Cotton-Waste Drier
11. Dipping Tank
12. Cooling Pits
13. Steeping Pot for Gun-Cotton
14. Hydro-Extractor or Centrifugal Drier
15_a_ & 15_b_. Gun-Cotton Beater
16_a_. Poacher for Pulping Gun-Cotton
16_b_. Plan of same
16_c_. Another form of Poacher
17 & 18. Compressed Gun-Cotton
19. Hydraulic Press
20. Thomson's Apparatus--Elevation
21. Elevation Plan
22. Trench's Safety Cartridge
23. Vessel used in Nitrating Paper
24. Cage ditto--White & Schupphaus' Apparatus
25. Do. do. do.
26 & 27. Nitrating Pot for Celluloid
28 & 29. Plunge Tank in Plan and Section
30. Messrs Werner, Pfleiderer & Perkins' Mixing Machine
31. M. 'Roberts' Mixing Machine for Blasting Gelatine
32. Plan of same
33. Cartridge Machine for Gelatines
34. Cartridge fitted with Fuse and Detonator
35. Gun-Cotton Primer
36. Electric Firing Apparatus
37. Metal Drum for Winding Cordite