Let. VIL Salts in. Water; 
297 

4. -§. Fourthly, What quantity of the feveral kinds of Sait, may 
be diflolved feverally, in the fame quantity of Water > 
5. §.. Fifibly, Whether by diflolving a salt in Water, there be any 
Space gained, or not ?. That is, whether the. Bulk of the Water be 
greater, before the Salt lying in it be fully diffolved, than it is after- 
wards? Or if aCubick Inch of Salt be diflolved in nine Cubickh Inches 
of Water, Whether the Water will then filla Veffel of ten Cubick Inches 
content ¢ 
6..§.  Sixthly, Whether the Space be equally gained, by an equal 
encreafe of the te Salt 2 : eg Aue : 
7. §. Seventhly, Whether upon the Solutiow of feveral kinds of 
Salts, be gained fo many feveral quantitics of Space? That is, if the 
Solution of common Salt gains, fuppofe, an Ivch, whether the soluizon of 
Salt Armoniack gains as much, or more, or lefs ? and {0 for other Salts. 
8. §. Eighthly, What that juft {pace may be, which any Salt gaineth 
with refpeét to its own Bulk, or that of the Water ¢ 
g. g. And firlt, for the Superimpregnation of Waters I put into 
a bottle 3ij of fair Water; adding thereto, firft halfan Ounce of Ni- 
tres and afterwards more, asthe Water would diffolve it 5 and (that 
I might be fure the Izpregnation was full ) fome portion above what 
the Water would bear. Then having feparated this remaining portion 5 
I put to this solution of Nitre, two Drachms of Sal Armoniac which 
wholly and eafily diffolved in the faid solution 5 though it would not 
bear a grain more of Nifre. Ithen added a third Drachm of Sal Ar- 
moniac, after thata fourth, and a fifth; all which, within the fpace 
of halfan hour, were perfectly diffolved inthe faid Solution, without 
any precipitation of the Nitre. 
to. §. Inthe making of this Experiment, two things, to render it 
infallacious, areto be noted. That the faid Salts were not diffolved 
by the help of Fire, but only by a ftrong and continued Agitation: 
And that this was done upon a warm day: which I mention, becaufe 
that even the changes of the weather will fomewhat alter the solubi- 
lity of the Salts. 
11. §, Having made the Experiment upon two Salts,1 proceeded to 
repeat it upon three. And firft I diffolved as much common Su/t in 
2ij of Water, as that quantity would bear. Then having feparated 
the fub(iding portion 3 I put to the Solution, no lefs than five Drachms 
of Nitre, which by a continued Agitation, was wholly diflolved there- 
in, neither the Nie nor thecommon Sult being in the leaft precipitated. 
hen adding a Scruple more, it would not diflolve, but fubfided’ This 
fecond fufiding portion, I again feparated; and then put to this Super- 
impregnation, near 3) of Sal Armouniac, which was alfo diflolved as the 
former. And ifas many more Sa/ts had been added, tis probable that 
the fame Water would have born fome quantity of them all. 
12. ¢. From this Experiment, it is a Conclufion demonftrated, 
That not only the vifible Cryffals, but the very Atomes of every Salt, 
at leaft thofe Particles which are ultimately diffolved in Water, have a 
different Figure one from another. Becaufe that if they were all of 
one Figure; there would be no Superimpregnation, but the Pores of 
the fame Water, would imbibe as much of one Salt, as anfwers to the 
total of two more Salts imbibed: that is to fay, it would as well 
imbibe two Ounces of common Suit, as oneOunce of common Sa/t and 
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