PLATE XVI. — THE ROT. 



Fig. 1. A section of an olive branch recently attacked by the 

 rot (a) increase of cambium, (enlarged nine times.) 



Fig. 2. Another similar section, showing herbaceous growth,, 

 (nine times enlarged.) 



Fig. 3. Transverse section showing the tubercles of the rot have 

 reached the heart of the tree. 



Fig. 4. A diseased branch (natural size) showing at d how the 

 bark splits from the wood, leaving it intact. 



