NATURAL WOUNDS. 211 



Buried letters, etc. These processes of healing 

 by occlusion enable us to understand how letters 

 of the alphabet, cut into the wood of trees, come 

 to be buried deep in the timber as successive 

 annual rings cover them in more and more. 

 Chains, nails, rope, etc., have frequently been 

 found thus buried in wood. 



Notes to Chapter XXII. 



In addition to the notes to the last chapter, the reader 

 may be referred to Fisher in Vol. IV. of Schlich's Manual 

 of Forestry., Chap. VI., for an account of Hess' excellent 

 work on Boring Beetles, etc. 



The authority on Wood-fungi is Hartig, see especially his 

 Zerseizimgs-erscheifiungen des Holzes, the principal results 

 of which are condensed in his Diseases of Trees already 

 referred to. As regards " Pith-flecks," the reader should 

 consult Frank, Krankh. iter Pflansen, B. I., p. 212 : the 

 subject needs further investigation. 



