. The spontaneous combustion of coal . days longer. -49- SERIES IV. WET GOAL3$ Pyrite. Coal0 Coal0-1/6 Coal1/8-1/4 Time in hoursOven TemperatureCoal Rise :C. Time in hoursOven TemperatureCoal Rise °0. Tl Time in hours Oven Temperature °C. Coal Rise Time in hours Oven Temperature °C. Coal Rise Coaltookfire ? Coaltookfire. -50- SEKIES V. DRY COAL5fc Pyrite. Coal0 Coal0-1/8 Coal1/8-1/4 Time in hoursOven Temp

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. The spontaneous combustion of coal . days longer. -49- SERIES IV. WET GOAL3$ Pyrite. Coal0 Coal0-1/6 Coal1/8-1/4 Time in hoursOven TemperatureCoal Rise :C. Time in hoursOven TemperatureCoal Rise °0. Tl Time in hours Oven Temperature °C. Coal Rise Time in hours Oven Temperature °C. Coal Rise Coaltookfire ? Coaltookfire. -50- SEKIES V. DRY COAL5fc Pyrite. Coal0 Coal0-1/8 Coal1/8-1/4 Time in hoursOven Temperature ° Rise , 7£. Time in hours Oven Temperature ° Rise Time in hours Oven Temperature °C. Coal Rise n Time in hours Oven Temperature CC. Coal Rise ?Battery worn out, so regulator did not work, was rechargedand put in order. -51. u- o? i. s. s. ronM 3spontaneouscombu00kres_0

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectcoal, booksubjectthes