30 



WOOD TURPENTINES. 



FIG. 17. Separator. 



REFLUX-CONDENSER SECTIONS. 



The reflux-condenser sections 

 are really a combination of a 

 boiling-cap section with a reflux 

 condenser; that is, they are simi- 

 lar to figure 15, except that below 

 the return pipes there is a cham- 

 ber filled with copper tubes, 

 around which the vapors must 

 pass and through which water is 

 kept flowing. 



STEAM-CHAMBER SECTIONS. 



The steam-chamber sections 

 are like the boiling-cap sections, 

 except that they are higher and 

 are furnished with two steam 

 inlets near the bottom and an 

 opening near the top for connec- 

 tion with the pressure regulators. 



OUTLET SECTIONS. 



The vapor-outlet sections are 

 simply chambers for covering 

 the top of the last boiling cap or 

 reflux section, and are provided 

 with a suitable opening for con- 

 veying the vapors to the con- 

 denser. 



PRESSURE REGULATORS. 



A sketch of the pressure regu- 

 lator is given in figure 16. It 

 consists essentially of two cham- 

 bers, A and B, separated by a 

 rubber diaphragm. Any motion 

 of the diaphragm such as might 

 be caused by a change of pres- 

 sure in either chamber is com- 

 municated by the system of levers 

 to the steam valve D. For in- 



