MISCELLANEOUS: TUMORS IN ABSENCE OF PARASITES 479 



FIG. 358. Chestnut wood of the year 1914 in cross-section, showing tyloses 

 in the pitted vessels. Bark injected by Caroline Rumbold in the Spring of 1914, 

 with %oo g-in- Li 2 CO 3 , cut and stained by her in 1915. Photomicrograph by 

 the writer November, 1916. 8 mm. Zeiss apoc. obj., Xo. 4, comp. ocular and 

 bellows at 35 on small upright stand. (See Fig. 55.) 



