1898.] A New Portable Miner s Safety-lamp. 



FIG. 7. Actual Dimensions of Benzoline Flame and Caps. 



497 



FIG. 8. Actual Dimensions of Oil Flames and Caps. 



The continuous lines represent small blue flames and their caps. 

 The dotted lines represent caps produced when the flame was adjusted so as to give 

 maximum caps. 



