42 



T. TADOKORO. 



1. The Loss of Weight. 



The loss of weight in the stem during retting depends upon the retting 

 liods and the retting grade which is again governed by the temperature 



In EuropeD the loss of weight is calculated as about 30% of the original 

 ; it in dew retting, about 25% in water retting and 40-50,%' in mud 



stim.-it.-d at about 18-] 



louble rettir 



).5% in the first watering 



about 8.8-9.0 <^ in the second wateri _ 



In Hokkaido, it is usually assumed to be about 19-20^ of the original 



stem. 



Results of our experimei 



ins point are shown in the following table. 



'stem, produced in Hokkaido in 

 1 water at 1G°-21° C. for 9 days, 

 experiment for 8 days. For the 

 ) "real loss" which is the loss of 

 >m free from the roots, terminal 

 id that in common retting, the 



