i] Dore-Miller: The Digestion of Wood by Teredo navalis 391 



TABLE 2 



Analyses of Wood and Borings. Series II 



As found. All figures in percentages of air-dried material 



Determination 



Original Wood 



Average 



Borings 



Average 



Moisture 



Ash 



Nitrogen 



Protein (N X 6.25).. 

 Benzene extract 



Sugars in alcohol extract.. 



Hemicelluloses 



(as dextrose) 



Cellulose 



Lignin 



Furfural yield 



8.47 

 6.90 

 0.14 

 0.87 

 0.46 

 0.39 

 nil 



11.08 

 11.76 

 39.44 

 23.63 

 4.93 



8.65 

 7.08 



0.39 

 0.36 

 nil 

 12.64 

 12.08 

 39.87 

 22.91 



8.56 

 6.99 

 0.14 

 0.S7 



0.40 

 nil 



11.87 



39.66 



23.27 



4.93 



7.49 

 18.83 

 0.70 

 4.38 

 0.40 

 0.38 



8.44 

 14.12 

 38.16 



5.80 



7.15 

 18.87 

 0.72 

 4.50 

 0.42 

 0.47 

 nil 



S.4S 

 15 70 

 37.71 



7.32 

 18.85 

 0.71 

 4.44 



0.42 



8.46 

 14.95 

 37.93 



5.80 



The purpose in determining moisture, ash, and protein was to 

 enable us to reduce all data to a comparable basis. Since normal 

 wood contains but small amounts of ash and protein, the amount 

 found of these constituents may be taken as an approximate measure 

 of the non-woody substances present in the samples. Accordingly, ash 

 represents chiefly mineral contamination (shell fragments, salt, etc.) 

 Avhile protein represents animal remains. 



The analytical figures for the respective wood samples and their 

 corresponding borings are not directly comparable with one another 

 since they are mixed with different amounts of non-woody material. 

 In order to bring them to a common basis, the data have been 

 recalculated to a moisture-free, ash-free, and protein-free basis. The 

 results are given in table 3. 



TABLE 3 



Recalculation of Data of Tables 1 and 2 



Hemicelluloses.. 



Cellulose 



Lignin 



Furfural yield... 



12.19 



21.54 



54.66 



S.36 



