Figure 8. — Effect of 

 (NH k ) 2 HPO k on the 

 rate of spread in 

 excelsior fuel. 



(NHJ 2 HP0 4 



2 4 6 8 10 



Grams of chemical per square foot 



12 



4.00 



— 3.20 



c 

 E 



O 



o 



a; 

 a 



2.40 



.60 



.80 



A (NH 4 ) 2 SQ 4 



J 



JL 



6 8 10 12 



Grams of chemical per square foot 



14 



16 



18 



Figure 9. — Effect of (NHi+) 2^0^, on the rate of spread in excelsior fuel. 



12 



