ae 
rft, Liver of fulphur is of all alkaline compounds the ftrongeft 
folvent of the colouring matter; next to this the cauftic vegetable, 
and after this the cauftic mineral alkali ; the mild vegetable and 
the mild mineral alkali occupy the laft place. Sulphur, it is faid, 
leaves a ftain in linen; but if liver of fulphur be ufed in the 
beginning, that is to fay in bleaching the yarn, the ftain will 
probably be removed by the purer alkalies afterwards ufed. 
Hence the folutions of kelp, cafhup and markoft are advantageoully 
ufed in the firft proceffes of bleaching, for which Dantzic and 
{weet barilha are lefs fit; but fix tun of kelp will be necefiary 
to produce the fame effect as one tun of cafhup ; yet as the former 
is manufactured at home it deferves the preference. 
adly, As the alkali manufaCtured from inland weeds is more 
powerful than the mineral, Mr. CLarxe’s is more powerful, or 
may be rendered fo, than any imported. It is already fufficiently 
cauftic, ‘and may be converted into liver of fulphur only by 
adding =; of its weight of fulphur to it when boiling, and thus 
it is fitted for the firft proceffes of bleaching. In its primitive 
ftate it is fit for the fecond procefs, and by rendering it) milder, 
which may be effeGed by burning half a bufhel of charcoal in a 
“pan in the fame room in which its folution ftands, it will be 
adapted to the laft proceffes, in which a lefs ative alkali is 
required, 
gdly, Cuarke’s falt converted into liver of fulphur is preferable 
_ to kelp, becaufe this latter, by the prefent manner of manufa@ur- 
ing it, holds charcoal in folution, this coaly matter it depofits on 
the 
