( 6 34 ) 
to urge the Trial yet further, I added as much of the 
fame diftiird Rain Water, as by a modeft Conje&ure 
made it amount to at lead half as much more. So that 
one Grain of Spirit of Salt had a manifeft Operation, tho' 
not quite fo confpicuous as the former, upon above three 
thoufand Grains of Water, whofe Immunity from com- 
mon Salt we try'd apart 0 and poffibly, if the Vial could 
have contained more, and would not have been , when 
fill'd, too heavy for our tender Ballance> the Difcoloura- 
tion of the Mixture would have bflgsp difcernable, tho' 
but one Grain of Spirit of Salt had been put upon Four, 
or even Five Thoufand Grains of Water. And that a 
drop of the Saline Spirit we made u(e of, did not equal 
in weight a grain of dry Salt; I found by this, that ha- 
ving let fall into a counterpoised piece of Glafs, ten drops 
of that Spirit, i found them to want near half a Grain 
of nine Grains weight which way of eftimating I chofe, 
as lefs fubjecSt to any confiderable Error, than that of 
weighing a fingle Drop by it (elf. 
XIV. The like Trial I made by fubftituting above a thou- 
fand Grains of Rain Water, in the room of the like quan- 
tity of diftiird Water. And thefe two Experiments I 
the rather mention, becaufe they do not only fliow how 
free the Patentees Water was from Spiritous, as well as 
from Corporal Sea-Salt but alfo manifeft that, whereas 
it is the Opinion of fomeSea*men, and of a Perfon, for 
whom I have a profound refpe£t, that Water ought to 
have a little faltifhnefs to preferve it ; if this be really 
a deferable Quality in our Artificial Water, it may in a 
trice be fupply'd with as much Saltnefs, whether Cor- 
poral or Spirituous, as fhallbe requir'd, and confequently 
as will bring it to be equal in that quality to the com- 
mon Water of Rivers, or of Springs. And perhaps 
'twill not be impertinent to add on this occafion, that 
in fome places, efpecially lying in hot Climates, it may 
iometimes be of good ufe to know, whether on the ac- | 
count ! 
