Twice I've tested positive for explosive residue--once in Spokane and once in Frankfurt. If you're running at all late, this can hold you up. In Spokane I was told ...

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IT may be of some interest at the present moment to give a brief summary of certain comparative experiments undertaken with nitro-glycerine and gun-cotton, with a view to ascertain their respective ...

III. NOBEL has observed that if, instead of making use of the most explosive form of gun-cotton, or trinitrocellulose, a lower product of nitration of cellulose (the so-called soluble or collodion gun ...

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