The Bridgeport times and evening farmer., 1922-04-12
U. S. Survey Of Smoke Evils Is
 Now Completed

Washington, April 1.-The "smoke eviP' in the manufacturing and bus mess centres of the large cities of the country is problem that is engaging the attention of the experts of the Federal Bureau of Mines. it was learned today.
 Tt is a problem that can not be easily solver,'' said bureau officials, following appeals from municipal au- thOrities in Akron and Springfield, O.. Salt Lake City, New Orleans and other large industrial towns for ad- vice in fighting smoke"
 Smoke" these experts say, ''the unsightly and offensive resultant of inn proper combustion, continues its rav- ages against the health and property of the American people, regardless of the ups and downs of the industrial barometer"
 They point out that no city in which a considerable quantity of bi- luminous coal is burned is free from smoke. The cities of the East. they say have avoided this problem by a general use of the smaller sizes of anthracite.
 For this reason," they add, 'it is not surprising that the greatest inn provement in the methods of burning bituminous coal has been made in the Central and Western States"
 Attention was called to the fact that stoves, ranges, house-heating boilers, hot-air furnaces and the like are in tended for the use of anthracite coal or coke. Whenever bituminouS coal is burned in such furnaces all the principles Of combustion are violated and smoke results" the experts say. The larger cities of the Eastern States, which consume practically all sizes of anthracite coal for power and the available supply of the smaller heating purposes now find it neces- sary to supplement this fuel with a considerable tonnage of bituminous coal.
 o1 Nv fnr larger mart the heat and power used in the United States is obtained from the burning of coal. It is evident, then, that for the most part this country must de- nend on it's bituminous coal for man. ufacturing, railroad and power plant purposes. This means that we must improve our usual meth ods of burn ing bituminous coal or continue to suffer from the lack of economy and the smoke resulting from imperfect combustion"
 According to the governments ex- perts t,.c smoke problem is nearly as old as civilization itself. for coal was mined in Great Britain about the tenth century. In 1906 Edward l issued a proclamation prohibiting the burning of coal in the city of London because of the "sulferous smoke and savour of the firing" In 164S the people of London petitioned Parlia, coal into the city. Beginning about 175O when steam was applied to in dustrial purposes, coal began to be used more extensively, and conse' uuently smoke became more abund ant. In 1919 the government ap- pointed a House of Commons com, Tnittee to inquire into the matter, and there were other investigations 1T other years
 Tn the United States the problem of course, did not develop so early but as cities of considerable size de' veloped here the problem was alsc felt and has been the subject of In vestigations, finally becoming or sucf importance that eXtens-Ye lnveslga tions were made in Pittsburgh, Chi Cago and Salt Lake City.
 The experts point out that Ism ok e less combustion requires the maln renance of a uniform and proper sup ply of fuel aand air under condition: of suitable temperature, mixing an6 volume of combustion space. Tn one word uniformity" they say, em braces most af the ideas for smokles combustion.