TABLE 203. 203 



CHEMICAL AND PHYSICAL PROPERTIES OF FIVE DIFFERENT CLASSES 



OF EXPLOSIVES. 



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



Cartridges i J in. diam. || For 300 grammes. 



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

 SMITHSONIAN TABLES. 



