COMMON THINGS FIRE. 



Fig. 6. 



burner will be more clearly comprehended by reference to fig. 6, 

 where c c represents the interior, and A A the exterior tube, 



between which the wick is in- 

 cluded. The oil is forced up to the 

 wick in the space between these 

 tubes ; a H G H is the chimney, 

 open at the base B B. The air 

 ascends as indicated by the arrows 

 between G H and D A, and passes in 

 contact with the external surface 

 of the flame, and it rises through 

 the internal tube c c, passing in 

 contact with the internal surface 

 of the flame, as indicated by the 

 arrows. The cylindrical flame, 

 ascending from the wick, is repre- 

 sented at AMOK", and the course 

 of the ascending column in the 

 chimney is represented by arrows. 



