Show stronie powder III making nearly a hundred establishments aro are engaged in tho the manufacture of bronze pow powder derin in and near the cities of furth and nuremberg germany it is composed of coppert copper tin inzina zino and antimony melted in proper proportions and cast first int into 0 roda rods of half an inch in diameter and about three feet long those rods being rolled until about two inches wido wide and then cut into suitable lengths for fur handling the pieces go to the hammers where they are beaten into a very small fraction of their former thickness and are then taken to a sulp sulphuric hurie acid bath where each sheet is washed to remove all impurities rust and dirt after being thoroughly dried the sheets are again hammered by steam hammers until no further reduction ia is possible thero there being a limit to which machinery can bo be used up to this stage the treatment which the metal receives whether intended for powder or metal leaf loaf is identical but now the process changes if designed for metal leaf the further beating is done by hand but if for bronze powder tho the sheets go to the shears where they are cut up into email small parti tirs ap and become known as clippings these are now ready for the stamp mills which are run in batteries knablin enabling one man to run or attend CO 50 or more when when sufficiently pulverized tho the powder is sifted in a special manner the heavier and better qualities going to one receptacle and the inferior grades to another new york sun |