Show 1 oudon audon fog over the mighty city amid certain atmospheric conditions tho particles of carbon form a canopy that obstructs the passage of heat and of che chemical rays from the center canter of life the sun eun there is a lowering of the temperature and animal vitality is diminished pure fog mist such as we see eee in the country does not seriously interfere with solar chemical energy mist is simply condensed vapor when it is frozen the particles form storage for the deposition of particles of carbon carboni or of sulphur it if the vapor is is merely in condensed watery particles it ii absorbs the hydrocarbons and the sulphurous acid produced by imperfect combustion of bituminous coals the innocent mist is thus converted into the yellow black fog known to the dwellers in london NatiO national lIal review |