xov. 1909.1 SinilAL— CITRUS TEIFOLI T IN JAPAN. 195 



is to be recommended mainly for use as a breakfast fruit. It is 

 very near to a sweet orange. 



" Young trees of three fruits have endured a temperature of 

 eight degrees above zero, and it is believed that by slight 

 protection for one or two winters, while the trees are voting, 

 they may be grown throughout South Carolina, Georgia, 

 Alabama, Mississippi, Louisiana, in the greater part of Texas, 

 in southern Tennessee and Arkansas, and in regions of low 

 altitude in Xew Mexico, Arizona, Oregon, Washington, and 

 northern Carolina. In none of the above regions, except 

 southern Louisiana and Arizona, can the ordinary orange be 

 successfully grown. The citrange will thus extend the region ol 

 citrus culture about four hundred miles north of the present 

 citrus belt." 



In 1907 Dr. \V. T. Swingle of U. S. Department of Agri- 

 culture, Bureau of Plant Industry, who is principally engaged 

 in the work of producing this frost-proof tj'pes, have sent a 

 letter to Dr. Takahashi, that he was anxious to get some in- 

 formation .about the northern limit of the distribution of the 

 trifoliate orange in Japan. 



Dr. Takahashi passed the letter to Professor Matsui, dircc" 

 tor of the Agricultural College, Imperial University of Tokyo, 

 and from the- director, I was asked to make a reply to the 

 letter. But as the matter had not been well informed before, I 

 have in turn sent letters of inquiry to the authorities in the 

 different places of northern Japan, such as Agricultural Experi- 

 ment Stations, Agricultural Schools, Branch Offices of Forestry 

 I 'epartment etc. 



In the due time replies to my letters have arrived from dif- 

 ferent places ; the contents of which may be summarized as 

 follows: In Sapporo, Hokkaido (Maud of Yczo) the trifoliate 

 orange does not thrive It is highly probable that it is also 

 the- cave with Fukuyama, Vesasi, and Hakodate in tin- southern 

 part- ol Hokkaido. Alioui the distribution in the main island 

 oi fapan opinions differ somewhal among authorities, somesa} 



that it thrives in all pail-- ol Tsugaru, others say that it 

 reaches only to Eiachinohe, and --till others think that it can he 



