A fire is raised by the poker only to let in the oxygen of the air, which, causing an intenser heat, increases the draught to the ... Coal and hard wood would kindle more easily if the oxygen were so increased as to produce heat enough toanbsp;...
Title | : | Class-book of modern science, by F. and T.A. Bullock |
Author | : | Francis Bullock, Thomas Austin Bullock |
Publisher | : | - 1880 |
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