1922] WILLAMAN & SANDSTROM—SCLEROTINIA 303 
the same general trend as do those for the corresponding juices. 
There are some indications in fig. 6 that the resistant varieties have 
a higher oxalic acid content than the susceptible, both with and 
without fungus action in the tissues. If this is found to be the 
case in future analyses, it may constitute some new evidence on 
the question of resistance properties. 
NITROGEN DISTRIBUTION.—In figs.-4 and 7 are presented the 
results of the analyses for total and for protein and non-protein 
nitrogen. There is great irregularity in the quantities of total 
nitrogen in the juice in the three groups of samples, so much so 
TOTAL NITROGEN IN J i 
| 
a | I | | 1 | 
ROTEIN NITROGEN, % OF |TO7AL, IN JUICE 
Lat dh ie fle | 
TOTAL NITROGEN IN RESIDU: 
WIL WL soem Wil Ube 
i) JUL ULL AW 
SOUND Rorred 
Fic. 7.—Graphs in which data for total and protein nitrogen are assembled to 
bring together resistant and non-resistant varieties of plums for direct comparison 
(see table I and fig. 4) 
that it is difficult to see any definite trend.to the graphs in fig. 4. 
In the case of the residue, there is some evidence that the rotted 
samples (c) have a greater amount of total nitrogen than the sound 
b). This is no doubt due to the facts that a far greater proportion 
of the nitrogen is in protein form in the residue, and that the build- 
ing of fungus protein makes this protein nitrogen still higher in 
the residues of the rotted samples. No definite trend nor signifi- 
cance can be seen in the data for the protein nitrogen in the juice. 
NirritEes.—No test for nitrites was obtainable in any of the 
samples. The disturbance of the nitrogen nutrition of the host 
