1896] A RUST AND LEAF CASTING OF PINE LEAVES 449 
being hygroscopic their weight increased and diminished with 
the ordinary changes in atmospheric humidity. The healthy 
leaves continued to lose at a diminished rate and at the end of 
288 hours were not yet dry. 
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Fig. 2. Diagram showing evaporation from diseased and healthy leaves. — 
One additional experiment in this connection may be of inter- 
It was carried on during the casting of the leaves for eS 
ssive years and each time with practically the same rest < 
Nenty-five small branches, containing about ay ee s 
“aves each, were cut during the night from a diseased tree, and 
amediately the cut end of each branch was pushed through a 
Pa hole in a cork and into a bottle containing water. ae 
being fastened into the neck of the bottle, the cork and nee 
mre sealed with paraffin, so that no water could escape excep 
est, 
Succe 
] 
