A " fog expert," Dr. J. S. Owens, writing in
the Daily Express of Wednesday, stated that the fog which has been with us for almost a week, though by no means one of the worst, had already cost London more than £500,000 in extra light and heat, in extra washing, and in loss to the shops, restaurants and theatres, and the workmen unable to work. This is an estimate only of what might be called direct loss. It does not include the terrible deterioration of most structures and fabrics in London and most metal work, or, again, the loss of human life and the impairment of health caused by black fogs. What is the remedy ? To find a remedy, on,-, must look for the cause. The harm is caused by the deposit of millions of particles of soot. How can thit, deposit be prevented ? Only by using gas, electricity. mineral oil, or coal from which the soot and smoke elements have been abstracted.
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