Spontaneous combustion of coal
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Article
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1911
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Elsevier Science
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English
โ 65 KB
IO 5 rinsed in water and placed in the " Coslettizing" solution, kept at the boiling point for 2~/~ to 3 hours. When completed the metal has a greenish-black appearance. It is. dried, then oiled with linseed or paraffin oil, which gives it a gray-l~lack color.