282 ISAAC A. HOURWICH 



panies. The manufacture of brass in Connecticut, which 

 is the principal center of that industry, is controlled by one 

 company. The consumption of spelter for use in the de- 

 silverization of lead is also chiefly in the hands of one corpora- 

 tion. It is safe to say, therefore, that 75 or 80 per cent of 

 the demand for American spelter now comes from seven 

 corporations. On the other hand, the production of spelter 

 has also been centralized, practically the whole of the active 

 smelting capacity being now divided among seven concerns. 



