EXTRACTS 



FROM THE 



BULLETIN OF THE FOREST EXPERIMENT 



STATION 



INVESTIGATION OF TREE SEEDS IN RELATION TO THE 



PRODUCING DISTRICTS OF THE MOTHER TREES 



AND THEIR DESCENT 



By Dr. HOMI SHIRASAWA, Forest Expert 



What influence has the descent of the mother tree upon the seeds? 

 was a question which was proposed by late Prof. Mayr of Munich 

 University at the occasion of third International General Meeting of 

 the Forest Experiment Stations' Union held at Bern, 1900. The question 

 so interesting to the industry was subsequently taken up by the con- 

 ference to be fully investigated, and experiments were undertaken by 

 different Forest Experiment Stations in Austria, Switzerland, Prussia, 

 Bavaria and Belgium. The Stations in Austria and Switzerland already 

 published their results in treating the growth of seedlings fully and 

 accurately. The work of our Institute was naturally limited to the 

 investigation of Japanese seeds, extending over a period of 10 years from 

 1902 and gave remarkable results, a resume of which is now published 

 in the general interest of the country. 



I. Origin of Seeds Used 



The tree species used in the experiment were Sugi (Cryptomeria 

 japonica), Akamatsu (Pinus densiflora) and Kuromatsu (Pinus Thun- 

 hergii), distinguished by the locality of the mother tree and age. 



The latitude and mean annual temperature shown in the following 

 table were furnished by the adjacent Meteorological Stations. 



