102 On the China-stone and China-clay of Cornwall. 



quainted with it, both in a raw and manufactured state, from 

 the most remote ages, but it is also probable, from the in- 

 teresting evidences lately brought to light, through the in- 

 dustrious exertions of Mr Layard, and from other sources, 

 that the Egyptians knew somewhat of its uses. 



"When obtained by Mr Cookworthy, in 1768, from the Les- 

 crowse and Trethose clay works, in the parish of St Stephens, 

 a large supply was at once demanded for the Staffordshire 

 potteries, which has gradually increased till the present 

 time. The average annual export of late years, which I have 

 been enabled to offer my readers through the kindness of 

 the most influential shipping agents in the neighbourhood, is 

 as follows : — 



At Charleston . 40,000 tons of China-clay. 



... Par . . 10,000 ... 



... Pentewan . 18,000 ... 



... other harbours . 12,000 ... 



Forming a total of 80,000 tons. 

 From the little attention paid to former exports of this 

 article, I have been unable to form an accurate estimation of 

 them, though some idea of the increase maybe gleaned from 

 the following estimates of the value of the exports of the 

 manufactured article, to the various countries with which 

 England has any commercial relations :— 



Shipped from Stafford in 1835 . £280,000 



1837 . 560,000 



1841 . 600,759 



... . 1851 . 1,210,000 



while adding to this the exports from Derby, Worcester, and 

 other potteries, will give a total of £2,150,000 shipped during 

 the past year ; in addition to which, of late years, a consider- 

 able amount of crude kaolin has been exported to every pot- 

 tery on the continent, and also to those of our inquiring 

 American brethren, while a small portion has been used for 

 bleaching. 



(To be continued.) 



