LODGE-NEWMAN ELECTRIC DISCHARGE APPARATUS. 



At the left corner of table is seen the large induction coil connected 

 to a mercury break, through which the direct current from the main 

 source of electricity is taken. The five glass globes mounted on a glass 

 stand are Sir Oliver Lodge's patent Valves, which only permit the 

 electric charge to pass through them in one direction. Mounted on 

 two porcelain tubes at either end of the " Valve" stand are the spark 

 gaps, consisting of adjustable brass balls intended to take any overflow 

 of current and also to indicate the available pressure. 



