Some of the astounding facts revealed by recent agitations over the London fog which covered that great city Hke a black pall during the latter part of last December, says "Modern Machinery," may furnish our Yankee genius with a greater incentive to get to work upon the solution of a problem long under consideration.

A week of fog in London costs the railway companies $1,000,000 and the cabmen $6000 a day. The loss to shopkeepers is beyond calculation, but reaches millions. The excess of gas used on a foggy day would supply a town of 40,000 people a whole year, showing that the gas companies at least are benefited. One hundred and fifty million cubic feet of gas isconsumed during one day of gloom, costing over $100,000. The Hon. Rollo Russell has estimated that in consequence of foul atmosphere Londoners are put to from $15,-000,000 to $25,000,000 in unnecessary expenses annually and in winter they are deprived of three-quarters of the sunshine they are entitled to. The agitators claim that the cause of this state of affairs is due to smoke from 600,000 houses and 14,000 factories. According to the careful calculations of an expert these smoke-laden chimneys pour forth 7,000,000 tons of smoke-laden air, that carries 300 tons of coal in suspension. Can nothing be done to relieve London of this plague, every return of which brings an alarming increase in the death rate through accident and from diseases of respiratory organs.