Electrical products asicacbin0*powDer. 221 



rine gas is formed is thoroughly ventilated, a 

 precaution which is very necessary in case any 

 one of the vats should spring a leak, as they 

 sometimes do. 



In each one of these vats where the elec- 

 trolytic process is going on there are two 

 products constantly passing off; one, as be- 

 fore mentioned, is chlorine gas, and the other 

 caustic soda in solution. The solution in the 

 vat is constantly being renewed by the sat- 

 urated solution of salt from the reservoir be- 

 fore mentioned. There is one stream contin- 

 uously coming into the vat and two going out, 

 caused by the decomposing power of the elec- 

 tric current. The solution of caustic soda is 

 carried to large evaporating-pans, where the 

 water is driven out of it, leaving the caustic 

 soda in dry, white sticks of crystalline forma- 

 tion. In this process the electric current, 

 which comes from the power-house with an 

 energy of 2000 horse-power, has to be trans- 

 formed twice; first, to bring it to the proper 

 voltage for the work of decomposition, and, 



lly, to change it from an alternating to 

 a dim-t current, by which all electrolytic proc- 

 esses are carried on. 



; will notice that the electrical energy 

 exiM-ndod in tlii- <-t:iMi>lnnent is double that 



in the m;umf;irtmv of carborundum. 

 Tin- r;m-ii<- ><];i. which is one of tin- [n"i 



ucts from the deoompotitioi] of -;ilt, i- 



