160 



BULLETIN OF THE BUREAU OF FISHERIES. 

 ( '(imposition of Porphyra. 



Locality. 



Suna 



Do 



Fukagawa. 

 Shinagawa 



Flit. 



Ash. 



Pi , a •>'■ 



0.700 



.500 



I 210 



,650 



Pi r ct nt. 

 9.000 

 9.340 



S.M-ill 

 in 685 



The preparation of Porphyra. From a Japanese print. 



SEAWEED IODINE. 



GENERAL INFORMATION. 



Although the manufacture of iodine from seaweeds is of comparatively recenl 

 origin in Japan, that country now supplies a considerable part of this commodity 

 used in the world, supplanting Scotland, which formerly produced most of the iodine, 

 extracted from marine plants. Up to ten years ago the business was very profitable, 

 but, owing in part to competition and in part, perhaps, to a scarcity of suitable raw 

 material, it has become less remunerative. 





