n8 



DO AND DO NOT WITH THE LIME LIGHT [Cn. IV 



8. After the exhibition is over 

 remove the lime or it will 

 slake in the holder. 



8. Do not leave the lime in 

 the holder to slake after the 

 lecture. 



9. Conduct the exhibition 

 exactly as with an electric 

 lantern (Ch. I, 21-40). 



10. As the hydrogen or its 

 substitute is inflammable, and 

 the oxygen is a perfect supporter 

 of combustion, follow the direc- 

 tions given by the manufac- 

 turers of a special apparatus 

 intelligently and exactly. 



9. Do not spare any pains in 

 conducting an exhibition with 

 the lime-light magic lantern. 

 More care and skill are neces- 

 sary than with the electric light 

 lantern. 



10. Do not take any chances 

 when dealing with the oxy- 

 hydrogen lantern. Do things 

 in the right order, and do not 

 neglect the directions of the 

 manufacturers. 



