THE ALUMINUM ELECTROLYTIC CONDENSER 63 



never been renewed since the condenser was installed and after the 

 period of service shown the electrolyte was still free from the white 

 precipitate of aluminum hydroxide. 



What the ultimate life of a condenser of this type will be remains 

 for future determination. Judging from the appearance of cells that 

 have operated for six and seven years there would seem to be years 

 more of useful service to be rendered by these cells. 



