Methods for Determining Osmotic Pressures. 173 
Salicornia ramosissima (from higher ground). 
Gram Molecular Concentration of NaCI. 
equivalent to that of a 1 *45 molecular solution of sodium chloride, 
i.e., to 56-53 atmospheres. 
Cotyledon sp. 
Gram-Molecular Concentration of NaCI. 
•15 
•14 
•13 
•12 
•11 
1st 
2nd 
1st 
2nd 
1st 
2nd 
1st 
2nd 
1st 
2nd 
Head- 
Read- 
Change. 
Read- 
Read- 
Change. 
Read- 
Read- 
Change. 
Read- 
Read- 
Change. 
Read- 
Read- 
Change. 
mg. 
mg. 
mg. 
ing. 
mg. 
ing. 
ing. 
mg. 
ing. 
ing. 
58-7 
55-2 
65-3 
63-5 
79-8 
80-9 
+ 
54-3 
5(5*2 
+ 
68-4 
69-8 
+ 
72-2 
75-ti 
+ 
87-3 
88-9 
+ 
55-4 
54-8 
— 
54-7 
52-4 
— 
47-1 
44-6 
632 
58-7 
- | 
89.0 
87-2 
— 
48-0 
48-3 
+ 
53-5 
56-5 
+ 
52-6 
55-2 
+ 
87-6 
90-0 
+ 
82-6 
84-6 
+ 
38-4 
37-5 
— 
63-4 
61-8 
— 
70-1 
67-5 
50-7 
47-9 
— 
74-2 
72-1 
58-4 
59-3 
+ 
58-2 
59-8 
+ 
354 
37-1 
+ 
Osmotic pressure of cell sap is therefore equivalent to that of 
a -135 molecular solution of sodium chloride, i.e., to 5 - 9 atmospheres. 
Clinia nobilis. 
Gram-Molecular Concentration of NaCI. 
•10 
•09 
•08 
•07 
•06 
1st 
2nd 
1st 
2nd 
1st 
2nd 
1st 
2nd 
1st 
2nd 
Read- 
Read- 
Change. 
Read- 
Read- 
Change. 
Read- 
Read- 
Change 
Read- 
Read- 
Change. 
Read- 
Read- 
Change. 
ing. 
ing. 
mg. 
ing. 
ing. 
mg. 
ing. 
mg. 
mg. 
mg. 
73-4 
71-3 
56*9 
54-8 
26-0 
27-2 
+ 
14-7 
15-5 
+ 
52-0 
54-0 
+ 
67*1 
68-6 
+ 
59-7 
59-9 
+ 
51-4 
51-1 
— 
59-5 
58-7 
+ 
98-8 
95-6 
— 
83-8 
82-6 
35-3 
35-1 
— 
20-G 
20-8 
+ 
51*1 
54-3 
— 
76-8 
78-6 
+ 
56-7 
57-6 
+ 
73-9 
74-1 
+ 
42-0 
41-9 
— 
49-5 
48-7 
— 
43-4 
41-5 
— 
61-8 
59-6 
27-8 
27'6 
75-2 
75-4 
+ 
47-2 
47-4 
+ 
44-8 
46-8 
+ 
The osmotic pressure of the cell sap is equivalent to that of a 
•085 gram-molecular solution of sodium chloride, i.e., is equal to 
3-7 atmospheres. 
