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taining the seeds. On October, 1908, the cellar was enlarged to a length 

 of 9.5 metres and was put 5.3 metres below the ground with a height of 

 3 metres. It was made in brick masonry of four sides and is provided 

 with air passage. The moisture in the cellar after the alteration showed 

 no change while the temperature rose considerably according to the season. 



Fire-dried seeds were obtained by drying the ordinary air-dried 

 seeds in the air bath at 40°C. in March, 1906. 



The last mentioned seeds was obtained by the following process; a 

 small quantity of seeds was put into a small glass bottle having a well 

 fitting cork stopper and sealed hermetically by means of a paraffine 

 coating. A small glass tube was inserted through the hole in the cork 

 stopper in order to remove the air by means of an air pump. After 

 removal of the air, the bottle was immediately sealed. 



Air-dried seeds were put into bottles 13.2 cm high with a diameter 

 of 8.3 cm; fire-dried seeds into those 7.3 cm high with a diameter of 

 4.4 cm. Every bottle so filled was well sealed with a parafiine coating 

 on the stopper to prevent the passage both of air and humidity and 

 were put in the cellar above referred to. 



In the case of air-dried seeds, seeds from the same bottles were 

 used for each trial. In the case of fire-dried seeds, out of 15 bottles 

 originally put into the cellar, one bottle is taken out every month to 

 supply seeds for each trial, the content of the same bottle never being 

 used for two trials. 



After three experiments tried during March, 1906, we obtained the 

 following results expressed in percentage of seeds which germinated. 



Species Percentage of germination 

 Sugi (Cryptomeria japonica) 83 



Kuromatsu (Pinus Thunbergii) 97 



Karamatsu (Larix leptolepis) 68 



Kusu (Cinnamomum Camphora) 98 



The figures may be reckoned as the ordinary germination percentage 



of seeds and are served in comparing with those of subsequent experiment. 



In June, trial was made for the second time and similar trials were 



repeated in March, June, September and December every year for four 



successive years making 15 trials in all. Every species showed peculiarity 



in germination for every trial as is shown by the following figures. 



