[ 528 ] 
is rated at 2 ; tho' more than 30 Grains of it was 
taken to equal the Standard : But perceiving all of 
it was not dtflolved, an Allowance was made ac- 
c 
cordingly. On the other hand, as Part of the Hart’s- 
horn flies off, its real Force muft be greater than 
what appears b\ the Tab’e. The Salt of Amber is 
like wide volatile ; and as three Grains of it were found 
more prefervative than 60 Grains of Sea-Salt; it may 
therefore be much more than 20 times ftronger. 
This is indeed an acid -Salt ; but as the acid Part of 
it is inconfiderable, this high antifeptic Power muft 
be owing to fome other Principle. The Spiritus 
Mindereri was made of common Vinegar and Salt 
of Hartfhorn 5 the faline Mixture of Salt of Worm- 
wood Saturated with Lemon-juice. The alcaline 
Part in either .of thefe Mixtures- with Water only 
would. have refilled with a Power of 4-f-; fo that 
the Acid added render'd thefe Salts lefs antifeptic; 
viz. the Spiritus Mindereri by a Half, and the fa- 
line Mixture by a third Part : Which was a Circum- 
ftance very unexpected. 
3. Next I proceeded to try Relins and Gums, and 
began with Myrrh. As Part of this Subftance dif- 
fblves in Water, eight Grains were made into an 
Emulfion; but molt of it fubfiding, I could not 
reckon on a Solution of more than one or two 
Grains; which neverthclefs preferving the Flelh 
longer than the Standard, we may account the foluble 
Part 
Salt not acid. One Grain of Alum was weaker than 60 Grains of 
Sea-Salt j but two Grains were ftronger. The Power therefore of 
Alum lies between 30 and 60 ; but, as I could judge by the Expe - 
riment, nearer the firft Number. 
