105 
TAB. CCEIYV. 
I wave here figured some rather light mixed tints of 
Ochres, to show their varieties. They will all serve as paints, 
and might suit instead of mixing various substances to 
obtain the particular colours, when a considerable quantity 
of one tint is wanting; and they are more likely to be 
durable. 
The upper figure, or Saffron Ochre, as it is called in 
Wales, is of a greyish cast from the mixture of a minute 
portion of black Oxide of Iron with the yellow Oxide. 
The middle specimen came also from North Wales, and 
is of a deeper and peculiar tint.—These I received from my 
kind friend the Rev. H. Davies. 
'The lower figure represents an Ochre much resembling 
the Roman Ochre of the shops, and is easily procured. It 
is very useful in the warmish distant yellow in landscapes, 
&c.; but not quite so proper in delicate portrait painting, 
unless we attend to the nature of the substance, as it rather 
becomes deeper than fades, but after a day or two is very 
permanent. 
J have seen this Ochre in the Isle of Dogs, and observed 
that it might be saved or formed at any time in many situa- 
tions where Tron is present, or has been used in water. 
When procuring the Copper in Wales from the vitriolated 
waters it might be of some account.—I have had specimens 
from these works by favour of Lady Wilson, but do not 
know that it has been considered as an article of commerce ; 
it is rather brighter than common Roman Ochre, conse- 
quently more valuable-—I know not that we have a sub- 
stitute for Naples Yellow in England: most other earthy 
colours we have at least examples of, if they do not plen- 
ufully abound. 
