210 
[Assembly 
2* Kaolin of Siberia. 
Similar to those of France, are the quarries of porcelain earth of 
Misjcek, Jelowoi and Jelandishik, in the province of Isetsk, in Siberia. 
The establishment for washing and drying it, was founded in 1750. The 
first operation is performed on a grand scale. A number of tons of the ' 
rough kaolin is mixed at once with pure water in vats, which after re- 
maining a suitable time, is drawn off into tubs, from which again it is 
made to pass through seives of horse hair, and again it is filtered through 
those of taffeta or silk. Having passed through these several washings 
and filtrations, it is then put into the store house, where the whole li- 
quor is suffered to repose and become partially clear; it is then drawn 
from the large vats by orifices situated at different heights from the bot- 
tom. When the earth has attained, in the last vessels into which it is 
drawn, the thickness of pap, it is again decanted for a third time into 
tubs disposed according to the state or condition it is in. The kaolin 
thus purified, is transferred to rooms strongly heated by stoves, disposed 
on lattice work, and covered or defended by lace from dust, &c. It 
is afterwards moulded into regular shaped masses of about 40 pounds 
each. The earth thus prepared, is transported to St. Petersburgh, for 
the use of the imperial establishment. The quarries of Misjoek contain 
large plates of mica similar to those of Saint-Yriex, in France. 
3. Kaolin of China, 
The vast empire of China furnishes a very great abundance of this 
valuable earth. There are numerous manufactories cf it at Nankin and 
Tinqui. The period of their establishment is unknown, as well as the 
mode pursued in the manufacture of it. The borough of Kin-te-tchin, 
in the province of Kian-si, is the place where the best China ware is 
made. It appears that as early as the thirteenth century, what is usu- 
ally called the China w^are, was then manufactured at the city of Tin- 
qui. 
It is customary in China, to leave the earth exposed to the air for 
thirty or forty years; it is accumulated and preserved by the father as 
Bn inheritance for his children. 
In those accumulations, the petuntze undergoes a further decomposi- 
tion, and finally passes into the same state as the French porcelain 
earths. 
In general, the kaolin forms the base of the China ware, to which is 
added sulphate of barytes. 
