CH. IV] OXYGEN GENERATOR AND ETHER SATURATOR 113 



175. For lighting the lamp. Whatever form of burner is used 

 turn on the illuminating gas first and light it; then turn on the 

 oxygen until the flame is made much smaller, as with hydrogen. 

 For warming and arranging the lime and its distance from the 

 nozzle of the jet see 158, 162-164. 



176. Putting out the lamp. Turn off the oxygen first, then 

 the illuminating gas. 



Remember that oxygen is always on last, and off first. 



LIME LIGHT WITH OXYGEN GENERATOR AND ETHER SATURATOR 



177. Oxygen generator. There has recently been perfected 

 a method of preparing sodium peroxide so that it gives off oxygen 

 gas when water is added, somewhat as 

 calcium carbide gives off acetylene gas 

 when put in water. This substance gives 

 about 300 times its volume of oxygen, 

 and serves very well for an oxygen sup- 

 ply when used in a proper generator. 



178. Hydrogen substitute. The 



substitute for hydrogen with this outfit 

 is sulfuric ether or gasoline. But ether 

 and gasoline should never be mixed. 



179. Use of the apparatus. There 

 must be a burner and lime holder as for 

 the oxy-hydrogen lime light. The sodi- 

 um peroxide (Oxone, oxodium, oxylithe 

 are trade names) is put into the generator 

 and the oxygen gas conducted over to the 

 ether saturator. In the saturator, the 

 stream of oxygen from the generator is 

 divided, one stream of the oxygen going 



directly to the burner through one tube, F]G 63. PORTABLE OXYGEN 

 and another part going through the ether 

 chamber of the saturator and becoming 

 loaded with ether vapor. This oxygcn- 



GENERATOR AND ETHER 

 SATURATOR. 



