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P. Gerald (Percy Gerald) Sanford
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CHAPTER I. INTRODUCTORY. The Nitro-Explosives—Substances that have been Nitrated—The Danger Area—Systems of Professors Lodge, Zenger, and Melsens for the Protection ofBuildings from Lightning, &c. The manufacture of the various nitro-explosives has made great advances during late years, and the various forms of nitro-compounds are gradually replacing the older forms of explosives, both for...
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