CHINA CLAY 



775 



Fig. 459, the elevation of the chimney. 



Fig. 460, plan at the ground level i, in figs. 455 and 459. 



Some modified arrangements in the mode of constructing the chimney and fire-place 

 have been devised by Colonel Douglas Galton. These will be found fully described in 

 the Eeport of the Committee ' On Waste of Coal in Combustion,' in the Eeport of the 

 Eoyal Coal Commission. 



456 



CHINA CLAY. A fine white clay produced by the decomposition of the felspar 

 of the granite rocks. It is found and prepared, in this country, in Cornwall and 

 Devonshire. See CIAY. 



