HEARTWOOD OF CRYTOMERIA JAPONICA 



855 



(I) Shavings were first subjected to rapid drying which enabled 

 those of "black wood" to avoid the extreme darkening. 0.2 gram of 

 each material were then extracted with 10 c. c. water during one hour. 

 6 c. c. of each infusion was taken into separate tubes with one drop of 

 9 per cent alkali. To get equal tint in each infusion, excess water 

 was added to the denser, using the lightest one as the standard of 

 comparison. 



Table 2. 



The above results show that "particular substance" is more abundant 

 in "black wood" than in "red wood." 



(II) The same tests were made with rapidly dried shavings from 

 green "black wood" (No. 1-6, Table 3) and the shavings from the 

 inner part of both air-dried red and black woods (No. 7-9 and No. 

 10-11, respectively), and gave the following results: 



Tabu 3. 



Kinds of 

 wood 



Tamagawa (Shizuoka) 

 Tamagawa (Shizuoka) 

 Motoyan^a (Kohchi) . . 

 Hinokinai ( Akita) .... J 



Hinokinai (Akita) 1 



Nifuna (Akita) J 



Nibetsu (Akita) . . i 



Nishikawa (Niigata)..; 

 Nishikawa (Niigata).. 

 Utosawa (Shizuoka ). .| 

 Okutani (Hyogo) i 



Black 



Black 



Black...... 



Black 



Black 



Black 



Weak black 

 Weak black 

 Weak black 



Red 



Red 



"int of shaving 



Reddish 



Reddish , 



Dark reddish 



Dark red brown 



Dark yellowish red brown 

 Dark grayish red brown. . 

 Dark yellowish red brown 

 Dark yellowish red brown 



Yellowish 



Reddish 



Reddish 



Diluted 

 \\«ater 

 (c. c.) 



11.5 

 12.0 

 13.0 



2.5 

 19.5 

 31.5 

 16.3 



0.0 

 25.0 

 31.0 



0.0 



