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A London encyclopaedia, or universal dictionary of science, art, literature and practical mechanics : comprising a popular view of the present state of knowledge : illustrated by numerous engravings, a general atlas, and appropriate diagrams (1829)

Curtis, Thomas, fl. 1820 · London : Thomas Tegg · leaf 457

An illustration from A London encyclopaedia, or universal dictionary of science, art, literature and practical mechanics : comprising a popular view of the present state of knowledge : illustrated by numerous engravings, a general atlas, and appropriate diagrams, 1829, leaf 457
ting the combustion of veryimpure oils, so that they shall burn for manyhours without smoke or smell. In lamps of the most common structure thewick should not be elevated too high abovethe surface of the oil, for, in that case, the ca-pillary action by which the oil rises between thefilaments of… … /.,.,„/.>„. fuMMai t.jr/,omu^r,y;/. /:i.f*^if«J-v^^^^-^ •*™^ ■t Lamp s. 429 ihe ijas, whose combustion constitutes the flame,and the flame will be too small. Tlie access of air is of the first importance inevery process of combustion. When a lamp isfitted up with a very slender wick, the flame…

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