PLATE 10 







Fig. l r vertical section; Fig. 2, cross-section, through portion 

 of a perfectly treated pile which was split and broomed during 

 driving. Teredo entered splits and worked through untreated 

 heartwood to the creosoted outer shell, which was attacked in a few 

 spots as shown by smaller pieces. (Bottom of photos is left side 

 of plate.) 



