NOTES ON CHINESE MATERIA MEDICA. 223 



W* Yuen-fun ; Carbonate of Lead ; White Lead. 



186O-62. 



Prepared at Canton and Soo-chow. A compound plaster, of Whl 

 which carbonate of lead and oil are the chief ingredients, is 

 used by the Chinese. 



$|1] $!< Tung-luh ; Carbonate of Copper (artificial). It Copper Carbo- 

 occurs in the form of small rectangular cakes of a pale, green 

 colour, opaque and friable. 



FERRUGINOUS SUBSTANCES. 



8. t Yen-sting ; Magnetic Oxide of Iron. A coarse, Iron Com- 

 black, sand-like powder, strongly attracted by the magnet. 



HI $& -?J Lin-tsze-sMh ; Magnetic Iron Ore. Pun-tsaou, 

 Fig. 45. 



P fffi 3?|ifJ Tsze-jen-tung ; Per-oxide of Iron in cubic masses 

 more or less broken. It appears to have been obtained by 

 calcining iron pyrites. Pun-tsaou, Fig. 5. 



T\I Iff,!* -?J Tae-choo-shth ; Ked Haematite; Per-oxide of 

 Iron. Pun-tsaou, Fig. 46. It has the form of botryoidal con- 

 cretions, with a scaly fracture, and ferruginous, metallic ap- 

 pearance. 



Pil 201 ^5 Yu-leang-shXh ; Brown Clay Iron Ore. Nodu- 

 lar concretions resembling the Lapis ^tites of old European 

 Pharmacy, a mineral which, to use the words of Geiger, " olim 

 dementer ad partum promovendum adhibebatur" 



$& %t J&r Woo-ming-e ; Hydrous Peroxide of Iron in 

 rounded grains ; Limonite. Purt-tsaou, Fig. 34. This substance 

 consists of rounded grains, varying in size between coarse sand 

 and mustard-seeds, with occasional grains still larger. Some of 

 them have a dark, polished surface, and metallic appearance, 

 but the majority are brown in colour, and are more or less dull, 

 when pulverized their colour is ferruginous. They are not 

 attracted by the magnet. An analysis by my friend, Mr. J. 

 Morland, jun., shows them to have the following composition: 



