48. Test Tube arranged for Heat Test
49. Page's Regulator
50. Do. showing Bye-Pass and Cut-off Arrangement
51. Will's Apparatus
52 & 53. Curves obtained
54. Dynamite Mortar
55. Quinan's Pressure Gauge
56. Steel Punch and Lead Cylinder for Use with Pressure Gauge
57. Micrometer Calipers for Measuring Thickness of Lead Cylinders
58. Section of Lead Cylinders before and after Explosion
59. Noble's Pressure Gauge
60. Crusher Gauge




NITRO-EXPLOSIVES.


CHAPTER I.

_INTRODUCTORY._

The Nitro-Explosives--Substances that have been Nitrated--The Danger Area--
Systems of Professors Lodge, Zenger, and Melsens for the Protection of
Buildings from Lightning, &c.


The manufacture of the various nitro-explosives has made great advances
during late years, and the various forms of nitro-compounds are gradually