400 

 300 



200 

 150 



100 

 80 



60 



40 

 30 



20 

 15 



• (NHj 2 HPO„ 

 ▲ (NH 4 ) 2 S0 4 



J I L 



8000 

 6000 



4000 



d 

 z> 



2000 e 



1000 



500 



200 



1 2 3 5 7 10 15 20 25 



Grams of chemical per square foot 



Figure 12.— Effect of (NH k ) 2 HP0 k and (NH^) 2 SO k on the rate of weight loss or equivalent 



energy release rate in excelsior fuel. 



200 r 



160 - 



120 - 



80 - 



40 -, 



• (NH^HPO 

 A(NH 4 ) 2 SQ 4 



IS 



J L 



-L 



J L 



6 8 10 12 



Grams of chemical per square fcot 



14 



16 



Figure 13. — Effect of (NHi+) 2 HP0i^ and (NHn) 2 S0^ on the residue in pine needle fuel. 



1 ! 



