1915] OSTERHOUT—PERMEABILITY 327 
The concentration used waso .005 M (1.44 gm. to 1000 cc. sea 
water). ae 
The curve obtained by using CdCl, +2H.0O is of a somewha 
different type from those previously met with. The rise is not as 
1100 OHMS 
20 30 HOURS 
harina in sea water 
Fic. 8.—Curve of electrical resistance of Laminaria sacc 
TOOo cc. +(NiCl,+6H.0) 1.19 gm. (=0.005 M) (unbroken line) and of a control in 
Sea water (dotted line). 
1000 OHMS 
800 | . ne 
Hite 
Sg 
i 
tga 
| ee 
ne 5 10 20 30 cabs 
charina in sea water 
f electrical resistance of Laminaria sacc 
1000 cc cb (n80c4 7840) I. oa (=0.005 M) (unbroken line) pa se a control in 
4 
sea water (dotted line). 
