A study has been made of diesel exhausts, and this paper relates the essential parts of what was found. Exhaust pollutants and their physiological effects are examined, and the steps taken by the National Coal Board for the protection of personnel and against dangers from explosions and fire are considered. The action taken to comply with statutory exhaust gas checks is given, and the necessary minimum ventilation of tunnels to acceptable standards is detailed. Other aspects of exhaust fume control, including that in confined spaces above ground, are dealt with. Finally, methods of treating diesel exhaust emission are suggested.
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