S44 MODERN STEAM PRACTICE . tage of a separate combustion chamber , to which air is admitted through a damper placed at the bottom of the diaphragm . Steam - inducted currents of air have been successfully adopted for the prevention of smoke , the air being forced through stay tubes placed on the… … fitted with steam pipes and noz - zles , or small jets , as has been already described . This plan has many advantages , the principal of which are , the easy mode of regulating the supply of air to suit the requirements , and that there are no mechanical difficul - ties in keeping the apparatus in…
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