[ 75 ] 
dorked, not only to prevent the Salts contracting a 
Dampnefs from the Air, which would lefleri the 
Degree of forced Concentration, which has been ac- 
quired by the Evaporation, but alfo to preferve what 
is fulphureous, which would exhale, if the Liquor 
remained longexpofed to the Air : For I fufpeCt, that 
that fort of He par, formed by the Union of the 
cauftic Salt with the Sulphur of the Afhes of the 
Giafs wort, ought not to be negledcd. Now, the 
better to dired thofe who have a mind to work after 
thefe Procefies, and to furnifh them with the Degrees 
of Concentration this Lye is to have, in order to make 
with Oil a folid-Soap out of it as fpeedily as poflible, 
I take a giafs Phial with a narrow Neck, and fill it 
with clear Water up to a Mark made on the Neck, 
That which I now make ufe of, being filled up with 
Water to that Mark, contains juft Three Ounces : I 
afterwards empty it carefully, and, inftead of clear 
Water, I fill it with that concentrated Lye as far as 
the forefaid Mark, and then I weigh it. If the 
Weight beincreafed Eight and an half orNmeDrams, 
that is, near Three Drams in each Ounce, this fhews 
that the Lye is neither too much nor too little con- 
centrated. An hydroftatical Balance, a Water-poife, 
and other Inftruments, might alfo give this Degree ; 
but in the Country they are not at hand, and I judged 
it beft to point out only what is molt eafy. Soap- 
boilers ufe for this End afrefh Egg 5 if one half of it 
finks into the Lye, they judge the latter to be of the 
firft Strength, that is to fay, that this is the Lye which 
they ought to employ laft of all in their Manufacture j 
if the Egg finks in to Two-thirds, the Lye is called 
the Second 5 and, laftiy, if the Lye covets the whole 
Is. Surface 
