46 BOTANICAL GAZETTE [yULY 
a minor factor. According to H6BER (5), the relative effectiveness 
of the alkalies i in precipitating colloids in an acid medium is as 
follows: lithium>sodium>potassium>rubidium>caesium. In 
an alkaline medium the order is as follows: caesium >rubidium > 
potassium >sodium>lithium. In the cases where lithium is more 
1 ae 
TABLE II 
LEAVES FROM PLATS FERTILIZED WITH POTASSIUM CHLORIDE 
Average number 
Average number) of seconds in- 
Salt treatment Other treatment Number of tests} of creases 
holds fire holding ca- 
pacity 
pS a 2s as o.2/N NaOH 60 54 49 
Nats. 2.56... . 60 2r 14 
oO eS eee . . 60 16 10 
RANK. o.5/N acetic acid 20 27 24 
NaCO,. . 2.25... -5 . 20 8 5 
BAAR. ee ee 20 9 6 
Cs,CO;. Nothing 20 61 57 
RAMS. oo 30 40 36 
ENN. oa oe. e: 20 48 44 
TABLE III 
_ LEAVES FROM PLATS FERTILIZED WITH MANURE ALONE 
' 
