Table 298 



CHEMICAL AND PHYSICAL PROPERTIES OF FIVE DIFFERENT 

 CLASSES OF EXPLOSIVES 



309 



Explosive. 



(A) 

 (B) 

 (C) 

 (D) 

 (E) 



Forty-per-cent nitro- 

 glycerin dynamite 



FFF black blasting 

 powder 



Permissible explo- 

 sive; nitroglycerin 

 class 



Permissible explo- 

 sive; ammonium 

 nitrate class 



Permissible explo- 

 sive; hydrated class 



Chemical Analyses. 



(A) Moisture . . . 

 Nitroglycerin . 

 Sodium nitrate . 

 Wood pulp . . 

 Calcium carbonate 



(B) Moisture . . 

 Sodium nitrate 

 Charcoal . 

 Sulphur . . 



(C) Moisture . . . 

 Nitroglycerin . 

 Sodium nitrate . 

 Wood pulp and ;r 



grains . . 

 Starch .... 

 Calcium carbonate 

 Magnesium " . 



de 



fibr 



from 



0.91 

 39.68 

 42.46 

 I3-S8 



3-37 



0.80 

 70.57 

 17-74 

 10.89 



7.89 

 24.02 

 36.25 



9.20 

 21.31 



0.97 

 0.36 



(D) Moisture 0.23 



Ammonium nitrate 83.10 



Sulphur 0.46 



Starch 2.61 



Wood pulp 1.89 



Poisonous matter 2.54 



Manganese peroxide 2.64 



Sand 6.53 



(E) Moisture 2.34 



Nitroglycerin 3°-85 



Ammonium nitrate 9.94 



Sand 1.75 



Coal 11.9S 



Clay 7-64 



Ammonium sulphate 8.96 



Zinc sulphate (7HO) 6.89 



Potassium sulphate '9-65 



* One pound of clay tamping used. t Two pounds of clay tamping used. t Rate of burning. 



§ Cartridges ij in. diam. || For 300 grammes. 



Compiled from U. S. Geological Survey Results, — " Investigation of Explosives for use it) Coal Mines, 1909." 

 Smithsonian Tables. 



