H4 TROUBLES WITH THE LIME LIGHT [Cn. IV 



ether vapor is inflammable and takes the place of hydrogen or 

 coal gas. The pure oxygen mixed with it just before it emerges 

 from the burner gives the necessary intensity to the flame. 



In using this outfit it is necessary to follow very precisely the 

 directions of the manufacturers to avoid accidents. In particular, 

 one must be sure to turn on the oxygen-ether first and light it; 

 then turn on the pure oxygen until the light is best. In turning 

 the light out: Turn off the oxygen first, then after a moment, 

 turn off the oxygen-ether supply. 



The oxygen produced from one charge of 3^ pounds of the 

 sodium peroxide (oxone) gives about 6.6 cubic feet of oxygen gas, 

 enough to last from two to three hours for the magic lantern. One 

 filling of the ether saturator requires about one pound of sul- 

 furic ether and will supply the ether vapor for the charge of 

 oxone. It is said by the manufacturers that if used economic- 

 ally the single charge of oxone and ether will supply a double lan- 

 tern for an entertainment lasting an hour or an hour and a half. 



TROUBLES WITH THE LIME LIGHT 



180. Snapping out of the light. This is usually due to an 

 excess of oxygen. The oxygen should always be less than the 

 hydrogen or any of its substitutes, i. e., illuminating gas, ether or 

 gasoline vapor, acetylene gas. To invert the statement, the 

 hydrogen or its substitutes, i. e., the inflammable gas or vapor 

 should be in excess of the actual combining proportions. If the 

 lime is too close to the burner tip the light will snap out. 



In case the light snaps out, at once turn off the oxygen. Light 

 the hydrogen and slowly turn on the oxygen again until a satis- 

 factory flame is obtained. Be sure the lime is not too close to the 

 burner tip. 



181. Going out of the light. This may be due (i) to a lack of 

 one or of both the gases used, that is, the supply may be exhausted. 

 Look at the capacity meter. 



(2) Some of the valves may be clogged. 



(3) A rubber tube may have split or come off at the connection. 



