United States Permissible Explosives

Swiss Permissible Explosives It does not seem that these expls have ever been manufd in Switzerland. Accdg to Dr A. Stett-bacher (private communication dated 9 July 1954), the so-called Sicherheitssprengstoffe" manufd in Switzerland are safe to handle and transport, but not against firedamp and/or coal dust, and there are no Testing Galleries in Switzerland for permissible expls United States Permissible Explosives, Accdg... 

United States Commercial Explosives of Nan-permissible type. Many expls of this type are known and used in mining, quarries, etc and they are too numerous to describe in this section. It would be more appropriate to describe them in alphabetical order throughout the Encyclopedia, such as Blasting Explosives, (See Vol 2, pp B 202ff), Blasting Gelatin (See Vol 2, p B 211-R), etc. 

A brand of gelatinons permissible explosives manufactured by United States Powder Co., Terre Haute, Ind. 

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