NATURAL HISTORY. 
nually shipped off to the potteries from Teignmouth, 
some of which 1s conveyed by carts to the Hackney 
cellars, but the principle part is taken down the 
Stover canal in barges. We must here acknow- 
ledge our obligation to S. Whiteway, Esq. to whom 
we are chiefly indebted for the account of this inte- 
resting formation, 
Lastly, the Bovey Coax. The chief use to 
which this is applied, is the manufacture of an in- 
ferior description of earthen-ware, at the potteries on 
Bovey heath ; it is also used as fuel, in the cottages 
of the neighbourig poor, but its difficult and im- 
perfect combustion, and the fcetid gas emitted du- 
ring the process prevents its being used to any 
great extent for domestic purposes ; many experi- 
ments have been made to render this article more 
extensively useful, but hitherto without any ap- 
proach to success, the large proportion of earthy 
and incumbustible matter it contains, having hither- 
to proved an insurmountable obstacle ; the charcoal 
produced from it is of excellent quality, but not in 
pieces of sufficient size and compactness to stand a 
blast. It would be a most important advantage to 
the neighbourhood, if any means could .be devised 
to make it available in the smelting of Iron; the 
chief difficulty to overcome appears to be, the get- _ 
ting rid of the ashes, which by their rapid accumu. 
lation, prevents a sustained white heat from being 
kept up in the furnace. We have ourselves made 
some unsuccessful experiments for this purpose, nor 
do we yet quite despair of seeing some plan devised 
