and the Application of it to stained Wood . Ill 
ease too much water, however, has been at first employ- 
ed, or too weak aquafortis, the colour becomes dark 
brown ; and therefore the addition of the aquafortis must 
be increased in that proportion which the solution re- 
quires, observing the above rules. 
This stain may be applied to all kinds of wood except 
oak, which contains too much astringent matter, and 
therefore on the first application becomes almost black. 
It communicates to the various kinds of wood different 
colours, according as it is applied in greater or less quan- 
tity; such as yellow, yellowish brown, and dark brown, 
witli reddish brown stripes or spots. 
As far as I have been able to ascertain by experience, 
this stain is one of the most durable ; it withstands the air 
and rays of the sun without changing its colour. I have 
specimens of it which have been exposed four years con- 
tinually to the sun and air, without their colour being al 
teredp 
2. Brazil Wood Stain . 
Eight ounces of real Brazil wood, four ounces of 
alum, and four ounces of finely pounded reddle or red 
ochre. Pour over this mixture a proper quantity of wa- 
ter; and, having suffered it to remain in that state twenty- 
four hours, boil it to a fourth part ; then strain it through 
a piece of linen cloth, and preserve it in a glass bottle for 
use. 
If one pound of the stain No. 1, be diluted with three 
pounds of water, immerse some pieces of wood in it, and 
deposit the whole in a warm place : the wood will imbibe 
the liquid to the depth of a quarter of an inch, and 
in the soft parts of the wood it will penetrate still fur- 
ther. 
It must however be remarked, that the staining liquor 
must be diluted with a greater or less quantity of water, 
