74 ANALYSIS OF EARTHS FROM CHINA. 



NOTES. 



I subjoin a communication on the subjects of the preceding 

 chapter from Professor Faraday: — 



Royal Institution, May 11. 1827. 

 Specimens of Earths from China. 



No. 1. Specimen from the Lapa, a hill near Macao. 



No. 2. Specimen from the north-east part of the province of 

 Fokien. 



No. 3. Ditto. 



No. 4. taken out of a pot containing a tea plant from the 

 Bohea country. 



No. 5. Bohea country, 1st quality. 



No. 6. ditto 2d quality. 



No. 7. ditto 3d quality. 



These earths were all of similar ferruginous tints, i. e. of 

 light yellow or reddish brown, as the one formerly analysed, 

 except No. 2., which was of a grey or brownish grey tint. 

 They were all of a clayey adhesive character, but easily crum- 

 bling and falling down in water. None of them contained worn 

 pebbles or worn sand, though some included fragmented stones, 

 and all of them sharp sabulous silicious particles. None of 

 them gave evidence of containing carbonate of lime except one, 

 and in that only a single piece of the carbonate was observed, 

 which was probably accidental. Their hygrometric state 

 appeared to be about that of the former sort, viz. 102. 



No. 1. contained no stony fragments or pebbles; the aggre- 

 gated portions were, however, irregular and dissimilar, being 

 of different colours, as if the soil had either been purposely 

 mixed with other soil, or else cultivated and manured. It con- 



