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GB180919A
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Improvements relating to the automatic charging of telpher or crane skips with measured quantities of material
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GB177422A
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Improvements relating to charging means for retorts for the distillation of carbonaceous materials
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DE369244C
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Gas firing for retort furnaces
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DE350941C
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Process for the distillation of carbonaceous material
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GB153139A
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Improvements in connection with the heating of vertical retorts for the distillationof carbonaceous materials
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GB144051A
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Improvements in retorts for the distillation of carbonaceous materials
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GB137647A
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Improvements in gas producers
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AU1954510B
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An improved discharging and charging machine for gas retorts
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