486 



ART INDUSTRY AND RELATED OCCUPATIONS. 



gives a number of his own investigations of the materials employed 

 in Japanese ceramics, and i? IV. is taken from these. 



The last three analyses of table A, as well as B V., VI., and 

 VII., were taken from the " Untersuchung von Chinesischen und 

 Japanischen zur Porzellanfabrikation verwandten Gesteinvorkomm- 

 nissen," von W. Pabst in the " Zeitschrift der deutsch. geol. 

 Gesellschaft," Bd. 32 (1880). F. von Richthofen furnished the 

 samples, besides notes on occurrence in Japan and at Arita. 

 According to these, von Richthofen regarded Arita-ishi as a ter- 

 tiary, unstratified rock, rich in silicic acid, and resembling rhyolith- 

 tufa, while the porcelain-stones of Kingte-tschin have great 

 similarity to " Halleflinta" and Petrosilex. 



The porcelain-stone of Yiikan, of which ^ VIII. and IX. are 

 two analyses by Salvetat, are called by him pegmatite, and by 

 von Richthofen porphyroid. B X. is an analysis of the pegmatite 

 of Yrieix, in France, published by Seger, and placed here for pur- 

 poses of comparison. 



r.-— Analyses of various Japanese Kaolins and Clays, com- 

 pared WITH some of other COUNTRIES. 



