Figure 9 

 Sections of untreated piling from Pier No. 91 > Seattle, Washington. 

 It is plainly apparent that the pile has "been ruined chiefly "by Teredo, 

 although there is evidence of a slight Limnoria attack around the 

 outer periphery. Pile had been in service only 11 months. 



Figure 10 

 A panel removed from a test "board at Pier No. 90, Seattle, 

 Washington. Pile had heen submerged 120 days. Most of the visible 

 damage was done by heavy Teredo attack. A trace of Limnoria is 

 also evident. 



11 



