248 BOTANICAL GAZETTE [MARCH 
was then allowed to stand over night in sea water. On the third, 
fourth, and fifth days the same experiment was repeated four times. 
On the fifth day the tissue appeared to be in as good condition as 
the control, and had a resistance which was slightly higher. There 
TABLE II* 
Resitande wk Resistance rose 
Beer pa bh ae Sed WELOE Recovered to 
neh +La.(NO3;)6 to 
ay I— 
Exposed during 5 minutes 750 goo 75° 
: : 750 870 75° 
Recovered during 55 minutes 750 goo 75° 
75° 850 735° 
Control= 730 
ay 2— 
Exposed during 20 minutes 700 860 710 
; 710 830 719 
Recovered during 100 minutes 710 850 710 
710 840 710 
Control = 690 
Day 3— 
Exposed during 30 minutes 690 790 710 
‘ 710 $o0- = 720 
Recovered during 100 minutes 720 790 710 
710 799 
Control= 660 ag 
Day 4— 
Exposed during 30 minutes 670 760 680 
: : 680 750 670 
Recovered during roo minutes 670 780 80 
680 770 680 
Control= 650 
aot Oe ee 
Day 5— 
Exposed during 40 minutes 660 760 660 
: : 660 780 660 
Recovered during 120 minutes 660 770 660 
660 760 660 
Control= 650 
* All readings were taken at 20° C. 
was no reason, therefore, to suspect that the changes in permeability 
had been attended by any injurious effect. The results are shown 
in detail in table IL and fig. 3. 
Similar experiments were performed in which calcium chloride 
was used in place of lanthanum nitrate. In this case 3-3 8™- 
