Apr.-Sept., 1914 
Illustrations 
xv 
Page 
Fig. 8 . Curve showing oxidation of phloridzin in the presence of the juice of 
potato foliage. 384 
9. Curve showing oxidation of o-cresol in the presence of the juice of 
potato foliage. 384 
10. Curve showing oxidation of m-cresol in the presence of the juice of 
potato foliage. 385 
11. Curve showing oxidation of p-cresol in the presence of the juice of 
potato foliage. 386 
12. Curve showing oxidation of m-toluidin in the presence of the juice of 
potato foliage. 386 
13. Curve showing oxidation of pyrogallol in the presence of the juice of 
potato tubers. 391 
14. Curve showing oxidation of O'-naphthol in the presence of the juice of 
potato tubers. 393 
15. Curve showing oxidation of tyrosin in the presence of the juice of 
potato tubers. 393 
16. Curve showing oxidation of hydrochinone in the presence of the juice of 
potato tubers. 394 
17. Curve showing oxidation of guaiacol in the presence of the juice of 
potato tubers. 395 
18. Curve showing oxidation of o-cresol in the presence of the juice of +* 
potato tubers. 395 
19. Curve showing oxidation of p-cresol in the presence of the juice of 
potato tubers. 396 
20. Curve showing oxidation of p-toluidin in the presence of the juice of 
potato tubers. 397 
21. Curve showing the differences in rate and extent of growth between 
healthy and diseased plants. 398 
Birds as Carriers op the Chestnut-Bught Fungus 
Fig. 1. Spores other than those of Endothia parasitica obtained by the micro¬ 
scopic examination of the centrifuged sediment from the test of bird 
No, 7, a downy woodpecker: a, Brown; A, dark brown; c> brown; d , 
cyanophyceous; e, brown; f, nearly black; g, smoky; A, brown; t, 
brown; j, brown; k, brown; l , cyanophyceous. 418 
2. Spores other than those of Endothia parasitica obtained by the micro¬ 
scopic examination of the centrifuged sediment from the test of bird 
No. 23, a brown creeper. Brown-spored forms appear to predomi¬ 
nate: a , Hyaline; A, hyaline; c , dark brown; d, nearly black; e , hya¬ 
line; f, light brown; g, smoky; A, pale smoky; i, dark smoky; j, 
hyaline; k, pale smoky; /, dark smoky; m , smoky; n, hyaline; o t 
brown; p , hyaline; q, dark smoky; r, hyaline; s, very dark, almost 
black. 419 
