and with a ratio of heating surface to grate sur- absorbs much heat from the waste gases and face of only 28 to 1. It is claimed that two boil- enters the furnaces at a high temperature. After making careful tests, John Brown & Co. (Ltd.), same sive fitted with the Sheffield, Eng., state that a… … ing of the economy in fuel—an investigation of showed an efficiency equal to 80 per cent of the actual calorific value of the coal used. With the claims for this new system of draft would seem to be a profitable field for investigation by Welsh coal, which has a calorific value of 16.18 engineers…
Shipbuilding -- Periodicals · Shipbuilding industry -- Periodicals
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