[Vor. 7 
304 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
TABLE II 
TITRATION DATA FOR CZAPEK'S SOLUTION 
H-ion concentration, Pa 
wol PI aad ANO ra Total 
(ce) | (€) | (e) | (qj | ee N/5 HCl. | N/1 H,PO, 
N/20 KOH | N/20 NaOH 
1 30 | 20.00 0.00 50 1.2 
2 30 15.00 5.00 50 1.3 
3 30 10.00 10.00 50 1.4 1.6 
4 30 9.50 10.50 50 1.4 1.6 
5 30 9.00 11.00 50 1.5 1.6 
6 30 8.50 11.50 50 1.5 1.7 
7 30 8.00 12.00 50 1.5 1.7 
8 30 7.50 12.50 50 1.6 ‘7 
9 30 7.00 13.00 50 1.6 EN 
10 30 6.50 13.50 50 1.6 1.8 
11 30 6.00 14.00 50 1.7 1.8 
12 30 5.50 14.50 50 LT 1.8 
13 30 5.00 15.00 50 1.8 1.9 
14 30 4.50 15.50 50 1.9 1.9 
15 30 4.00 16.00 50 1.9 2.0 
16 30 3.50 16.50 50 2.0 2.0 
17 30 3.00 17.00 50 2.1 2.1 
18 30 2.50 17.50 50 2.2 3.2 
19 30 2.00 18.00 50 2.3 2.3 
20 30 1.50 18.50 50 2.4 2.3 
21 30 1.00 19.00 50 2.5 2.4 
22 30 .50 19.50 50 2.9 2.6 
23 30 0.00 20.00 50 4.7 4.4 
24 30 .50 | 19.50 50 5.7 5.6 
25 30 1.00 | 19.00 50 6.0 5.9 
26 30 1.50 | 18.50 50 6.2 6.2 
27 30 2.00 | 18.00 50 6.4 6.3 
28 30 2.50 | 17.50 50 6.6 6.5 
29 30 3.00 | 17.00 50 6.7 6.6 
30 30 3.50 | 16.50 50 6.8 6.8 
31 30 4.00 | 16.00 50 6.9 6.8 
32 30 4.50 | 15.50 50 7.0 7.0 
33 30 5.00 | 15.00 50 7.1 7.1 
34 30 5.50 | 14.50 50 7.2 7.9 
35 30 6.00 | 14.00 50 7.4 7.4 
36 30 6.50 | 13.50 50 7.5 7.6 
37 30 7.00 | 13.00 50 7.6 7.7 
38 30 7.50 | 12.50 50 7.7 7.9 
39 30 8.00 | 12.00 50 8.0 8.2 
40 30 8.50 | 11.50 50 8.6 8.6 
41 30 9.00 | 11.00 50 8.9 Sy 
42 30 9.50 | 10.50 50 9.1 9.0 
43 30 10.00 | 10.00 50 9.2 9.2 
44 30 15.00 5.00 50 9.8 
45 30 20.00 0.00 50 9.8 
