RAW- SILK. 



]99 



day after day, in substitution of old worn-out ghyes. ) 

 Now, on the old plan, months are necessary to ofpouery gh>e 



build and dry. Apparatus. 



6. The cost of a pair of these pottery ghyes, 

 including two smoke-tubes of two feet long by 

 three and a-half inches diameter, and a water- 

 gumlah (not porous) embedded in mortar, as a 

 cistern, is seven sicca rupees : yet their unique 

 solidity and durability will further tend to economy. 



7. Now the cost of a pair of flue-ghyes at Com- 

 mercolly (according to the Superintending Engi- 

 neer's report of the 23d May 1829 to the Board 

 of Trade) with double iron doors and copper 

 basins, burning sixteen and a-half seers of wood, ex- 

 ceeds forty-three rupees, being six times the price 

 of a pair of finished pottery ghyes, and consuming 

 six and a-half seers more of fuel in each ghye to 

 produce the same quantity of silk. 



8. It will be seen by the model of this kft-ha.nd 

 ghye, that the smoke passes round from the fur- 

 nace-valve to the left, through the circular flue, 

 to the chimney on the right. Its escape is thus 

 retarded, and its warmth communicated to the 

 upper sides of the basin, which otherwise w^ould 

 be buried in mortar. This part of the scheme is 

 Captain Somerville's. But his flue is not pro- 

 duced by concave moulded bricks, and he uses the 

 oval flat-bottomed copper basin with straight sides, 

 the form of which, he admits, may be improved 

 with advantage, but this he had not tried." His 



diagrams 



