Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 509
d 920 THE BATTLE OF always to be on his guard against them. Inthe morning, when the sun warmed the earthand vapors were seen to rise from the dampsoil, tests had to be made of the vapors to seewhether it was mere water-vapor or diphos-gene, before men were allowed to walk throughit. These vapors… … <g) Kadel & Herbert BRITISH GAS-MASKS FOR HOUSES AND MEN uninhabitable except by men in gas-masks.The infected part of the trench, however, wascut off from the rest of the trench by meansof gas-locks—in other words, blankets wereused to keep the gas out; and usually twoblankets were hung, so…
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