1917] 
minor importance. 
KRAYBILL—ALKALI SALTS 
47 
It seems very evident that of all the alkali 
carbonates only those of caesium, rubidium, and potassium mate- 
rially aid the fire-holding capacity. 
Table III shows that of the oxalates of potassium, lithium, and 
sodium, only the oxalate of potassium is effective in increasing 
TABLE IV. 
LEAVES FROM PLATS FERTILIZED WITH MANURE ALONE 
Average nu 
Average number! of seconds in- 
Salt treatment Other treatment Number of tests} of seconds creases 
pacity 
Potassium Aisi .-.| 0.2/N NaOH 30 29 13 
Sodium citrate. ..... . 20 1§ 4 
pteocheres on eos oh. _ 20 16 6 
Potassium citrate....| o.5/N acetic acid 20 30° 19 
Sodium citrate. ..... . 20 18 I 
Lithium citrate......| . 20 19 - 
Potassium citrate Nothing 20 24 18 
Sodium citrate. ..... ” 20 10 4 
Lithium citrate . 20 Ir 5 
TABLE V 
LEAVES FROM PLATS FERTILIZED WITH POTASSIUM CHLORIDE 
ie! j ats 7 Ny } , : Hebe «Se . : = 
Potassium citrate... 0.2/N NaOH 50 28 
Sodium citrate...... ae 50 Ir 
Lithium citrate......) Pe ge we 
‘Potassium citrate....| o.5/N acetic acid 20 37 
Sodium citr: eels Seog 20 10. 
Lithium citrate. . . 20 > ve 
- the fire-holding cz capacity. ae again in the cases sates i lit rit 2 
Ss more effective than sodium i in the ——* ofc colloids, 
