The Middleport Pottery of Burgess and Leigh (opened 1888)  

Flint and Felspar - raw materials

 

Location 4 on the plan

Next: the 1888 steam engine 
Previous: the bottle oven

Feldspars (natural rocks of aluminosilicates) are used in stoneware and porcelain glazes because they fuse only at high temperatures. 
The effects of specific glazes on certain clay bodies depend both on the composition of each and on the potter's control of the glaze kiln.

 

Delivery point for the raw materials

Next: the 1888 steam engine 
Previous: the bottle oven