'Experiments to shew that some Damps in Mines may be occasioned only by the burning of Candles under ground without the addition of any noxious Vapour...' by Dr Desaguliers '...even when the bottom of the Pit has a communication with the outward Air unless the outward Air be forcibly driven in at the said Communication or Pipe' Outlines of 4 experiments Read to the Royal Society on 19 June 1735 1735