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DESCRIPTION OF THE PLATES. 





PLATE 4. Tsan-po, frames or hurdles for removing the silk worms, or 

 changing their litter. It is generally done at the North, 

 where a great many more silk worms are raised that at the 

 South. The facility of rolling and unrolling, renders them 

 very proper for their destined use. 



PLATE 5. Ma-theou-tso, oblong cocoon rooms. See the text, page 146. 

 Ibid, Figure 2. Interior hurdle of that cocoon room. 



PLATE 6. Touan~tso, round cocoon room. See the text, page 141. 



PLATE 7. Chan-po, cocoon room employed in the districts of Kia and 

 Hou. See the text. Supplement, page 168. 



PLATE 8. Kien-ong, jars where the cocoons are preserved under layers 

 of leaves and salt. See the text, page 154. 



PLATE 9. Kien-long, apparatus to kill the chrysalides by means of the 

 vapor of hot water. .^ 



There are some persons, who put two ounces of salt and 

 one ounce of rape seed oil into the hot water, in order that 

 the silk may not dry and that it may be easier to reel. See 

 the text, page 152. 



PLATE 10. This plate makes no part of the Chinese work. We owe its 

 communication to the kindness of M. Huzard, (of the 

 Academy of Sciences,) who possesses a large number of 

 drawings executed in China, relative to the raising of silk 

 worms. This new arrangement, where the hurdles are 

 warmed by chafing-dishes, confirms the observations deve- 

 loped in the article chan-po, of the Supplement. (Page 168.) 

 Their method, which appears to present great advantages, 

 differs from that of the raisers of Europe, who lower the 

 temperature of the silk room at the time when the silk 

 worms spin their cocoons. 



eA. 



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