T. TADOKORO. 



parenchyma, phloem-parenchyma, cambium and epidermis we 



The yellowish red 



• light 



1! hvers 



In the beginning of the last period of the retting, the middle lamella of 

 fibers showed almost no reaction of pectin compounds, but the cell- walls of 



showed a faint but distinct color and in the end of this period, the color was- 

 shown only on the inner thickening layer of fibers. 



3. Protein. With Millon's reagent, only the fiber lumen was stained 

 brick red, the other cortical parenchyma, cambium and epidermis as well as 

 the xylem portion being stained very faintly brown. 



4. Lignin. The red color produced on the use of phloroglucin and- 

 hydn «-hl, ,nV acid is a characteristic test for lignin. On the cross section, the 



at the end of the retting. " ' " POltl ° n ^ ^ 



5. Tannin. When potassium bichromate was applied on the cross sec- 

 tion, we observed the reddish brown color in the contents of the epidermal 

 cells and this color almost disappeared at the end of the middle period. 

 This phenomenon must be due to the effusion of the tannin from the cells, 

 accompanying the destruction of the inner walls, as the retting proceeds, 

 solution ^ 1U J° Se " ^ qUautity of cu P rous oxide formed by Fehling's 

 so ution on glucose was found to be very little, the greater part of the glucose 

 present being dissolved during the retting. 



c^cle h ^rt7T nts, L r ,sudan n1, ^ m ^°^^^^Tz 



Of these substances, we observed further that some of the cntin whioh i« 



