JHE KEROSENE LAMP 

 TELLS THE STORY 



Like the boiling 

 teakettle with James 

 Watt, the plain kero- 

 sene lamp revealed 

 the secret of per- 

 fect combustion 

 to John A. Secor. 



A lamp burner when turned too high furnishes too much oil, 

 which results in free carbon and a sooty lamp chimney. If the 

 lamp is turned too low the combustion becomes incomplete, and 

 the lamp throws off poisonous gases of an unpleasant odor. Good 

 illumination is dependent on careful adjustment of the wick by 

 means of the thumb wheel. This must be done several times each 



)iEPi/LL 



TftACTOJt 



