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great quantities of peat for fuel, while in this country, although the material was abundant, it had only exceptionally been prepared for use and then in the crudest way. During the next few months many experimental and speculative plants were established to convert peat into fuel, but unfortunately many of these attempts were financially unsuccessful, and as the strike was soon over and coal could again be had at reasonable prices and very little peat fuel was put o11 the market at any price, interest m peat waned and at the present time the public is almost indifferent to it. In the few places where it can be purchased, however, it finds a ready sale and is thoroughly satisfactory for all domestic uses.
An interesting account of the nature, origin, and uses of peat appears in a report by E. S. Bastin and C. A. Davis, on the peat deposits of Maine, which has just been published by the United States Geological Survey as Bulletin 376. Copieo~ this bulletin may be obtained free of charge by applying to the DireCtor of the Survey at Washington, D. C.
π SIMILAR VOLUMES
## Abstract The production of dust in natural stone transformation plants causes respiratory illnesses in workers that, over time, may seriously affect their physical health. In this article we study dust contamination in a number of ornamental slate and granite transformation plants located in Gal