Transactions . >oACj g. 4.—Section of E, ROOF FEET. INCHES INFERIOR COAL 0 3 CLAY SOFT MININGS I 7 CLAY COAL 1 11 FLOOR Pi ate DC. /;> illustrate MTJohn OerrardS Paper an Instantaneous Outbursts of Fire/damp /m<t r,,/,/ ,/, u/,/- ? < r///

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Keywords: ., book, bookcentury1800, booksubjectmineralindustries, bookyear1887