Petrol Burners.—Assume for a moment that the petrol for the burner has been vaporised (method to be described later) and transformed into gas, which we will for the future call 'vapour.' The Locomobile burner (figs. 1 and 2) takes the
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Fig. 1.—Plan View of Burner of a Locomobile
form of a shallow circular metal box about one and a quarter inch deep, and of slightly less diameter than the boiler under which it is placed. There are 107 half-inch tubes, which pass through the bottom and top plates of the box. In the top
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Fig. 2.—Section of Burner
plate twenty small holes are drilled round each of the half-inch tubes, and as the vapour is injected into the box at the pipe a it passes up these small holes round each of the air-tubes, mixed with the air continually sucked in with it as it enters from
