Saturate unglazed paper with a solution of 1 ounce pure lead acetate in half a pint of rain water; let it partially dry, then expose in the room suspected of containing sewer gas. The presence of gas in any considerable quantity soon darkens or blackens...
Handbook for Quartermasters: Pts. I to V.I. Administrative. II. Supply. III ... - Σελίδα 937
των United States. Army. Quartermaster Corps - 1930 - 1192 σελίδες
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