120 



tishtail lip. Points iu squares CZJ are tor a slotted lava tip or bat-wing 

 burner. Points in circle O are for Argand Inirner No. 1. 



In Fig. II are the mean values reduced to a standard basis, namely, 

 13.6 cubic feet gas. the mean values of the gas throughout the experi- 



IX 



10 



13 't^ot ■ ^'Vt-M^, 



ments as shown by the standard tishtail burner. Burner No. I was a 

 commercial burner, with the air supply almost all cut off from the out- 

 side of the cylindrical Itame. Burner No. II was a commercial, with the 

 holes closed with copper plugs, or IS holes open. Burner No. Ill had one- 



