I desire to call attention to a by-product which can be used where frequent dressings are necessary and where the question of expense is of importance. This is the ash of anthracite coal, used in stoves and furnaces all over the country and hence readily obtainable. The ash is neutral in reaction and, on careful analysis, shows no substance which, even if applied to an open wound, would cause irritation.
The ash collected from the furnace is placed in a flour-sifter and thoroughly sifted. It will be found to fall on a sheet of paper as a soft, brownish, floury powder. This is all the preparation necessary.
A piece of old sheet or well-washed linen is cut in rectangular shape and of any desired size. The square is placed on a table and a small pile of the ash is placed in the center. The sheeting or linen is then