During the late 19th century internal combustion engines were sometimes fueled by coal gas, and during the early 20th century many stationary engines switched to using producer gas created from coke which was substantially cheaper than coal gas which was based on the distillation ( pyrolysis ) of more expensive coal.
32.
Considerable repairs were necessary including replacement of the Ackroyd wood producer gas generator by a No . 6 Hornsby producer gas generator to operate on either coke or charcoal . 5, 677 tons of stone ( much of it surface loam ) were crushed for a yield of 756 oz of gold ( 3 dwts per ton ).
33.
Considerable repairs were necessary including replacement of the Ackroyd wood producer gas generator by a No . 6 Hornsby producer gas generator to operate on either coke or charcoal . 5, 677 tons of stone ( much of it surface loam ) were crushed for a yield of 756 oz of gold ( 3 dwts per ton ).
