56 BOTANICAL GAZETTE [JULY 
brown, distinctly depressed and separated from the surrounding 
healthy portions by a zone of hypertrophied tissues which are marked 
by numerous ragged fissures in the epidermis, through which the 
underlying chlorophyll-bearing tissues may be seen (jigs. 5, 6, 7). The 
peculiar appearance of this zone attracted the attention of Professor 
Atkinson, who on examination found it to be due to an cedematous 
condition of the tissues produced no doubt by the excessive supply of | 
moisture in the jars and by the stimulating effect of the fungus. Por- 
Fic. 12. 
tions of these tissues were selected for a more careful histological 
study, but they were unfortunately lost in an accident and we can only ; 
refer for a consideration of cedematous tissues to an article by Pro: 
fessor Atkinson on the cedema of the tomato.+ 7 
Trae Ais that by applying some of the spores to wounded — 
ues, while care was taken to apply others to uninjured areas of the 
cuticle, some light might be thrown upon the manner in which the 
fungus first gains entrance to the cortical tissues: but owing to the 
fact that no results were obtained from any of the ceutoas treated with 
mercuric chlorid the test was unsatisfactory. 2 
pagh beginning it was realized that such inoculations would a5 : 
solute proof of the parasitic nature of the fungus, since it is of 
A 
TKINSON, G. F.: a 
Pl. 8. 1893, (Edema of the tomato. Bull. Cornell Univ. Expt. Sta. 75* — 
