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17 The carbonaceous combustible material contains 0.40% grease or oil which was added to the ammonium nitrate to countcract its hygroscopicity. Note that the figures in the first two columns of the table represent results of analyses; those in the third column represent the formula according to which the exploeive is mixed.

17 The carbonaceous combustible material contains 0.40% grease or oil which was added to the ammonium nitrate to countcract its hygroscopicity. Note that the figures in the first two columns of the table represent results of analyses; those in the third column represent the formula according to which the exploeive is mixed.

Monobel (density about 1.15) gives a lead block expansion oi about 350 cc. and a lead block crushing of 12 mm. He states that Monobel belongs to the class of typical ammonium nitrate explosives rather than to the dynamites, and points out that no specific effect can be ascribed to the 10% nitroglycerin which it con-

tains, for an explosive containing only a small quantity, say 4%, tains, for an explosive containing only a small quantity, say 4%,

Fiourr 88. Dynamite Manufacture. (Courtesy Hercules Powder Company.) Cartridges of dynamite as they come from the semi-automatic packing machine.

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