602 Earthenware. 



chatties made of clay as crucibles for containing the materials ; and 

 brass-workers throughout India use for melting brass, crucibles of 

 good quality, formed of a mixture of red clay, sand, and charcoal, 

 which stand a high temperature for a long time ; also the whole of 

 the cast steel made in India is fused in crucibles made of a red clay ; 

 and as steel requires for its fusion almost the highest heat of a blast 

 furnace, it cannot be doubted that clays sufficiently refractory for the 

 purpose of making pottery, can be readily found, if properly sought for. 



12. The white goglet of Arcot is well known, and the black and 

 blue clays of various parts of the country are too common to require 

 note, while the beautiful black clay, (probably manganesian,) have 

 been long admired in the Beder-ware, of which hookah bottoms of high 

 price are manufactured. 



13. That pipe clay abounds, is shewn by the readiness with which 

 troops obtain it in all parts of India, although I am unable to specify 

 the localities from which the supplies are derived. 



14. A silicious material is readily found in the white quartz 

 which abounds in all parts of South India, of a finer quality and 

 greater degree of purity than can be afforded by any kind of flint, and 

 any degree of admixture of lime required in the manufacture may be 

 produced by fusing together quartz and pipe clay with lime, either as 

 a carbonate or in the caustic state, and grinding down the mass after- 

 wards for mixture with the other materials ; while the soda required 

 in the preparation of glasses, can be procured as a mineral pro- 

 duct in any quantity, (as shewn in a former Report.) 



15. In preparing the material in England, the calcined flint is first 

 ground to an impalpable powder in a mill, and the clay earth is 

 worked and mixed in mills for the purpose. 



16. The materials thus prepared, are mixed and stirred up with 

 water, (called blunging the clay,) and being then allowed to settle, the 

 coarser and gravelly particles are deposited, while the finer are 

 drawn off suspended in the water, and it is then strained through 

 sieves of lawn, by which all impurities are separated, and the fine 

 pulp thus formed is called " slip." 



17. The quantity of the materials which the various slips contain, 

 is ascertained by their specific gravity, and these being mixed to- 

 gether in proper properties, the proper mode of managing which 



