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_ Experiments in diffolving Led. VIL 
another of Nétre: which yet is contrary to the Experiment. And it 
isthe fame thing, whether we fuppofe the Pores of Water to be alfo 
different, or not. Becaufe, that if the Figure of all the faid Atomes be 
the fame; then their refpe@ to the Pores of the Water muft be the 
fame, how different fo ever thofe Pores be: which is alfo contrary to 
the Experiment. Befides it is a great prefumption, to fay, that the 
Pores, and therefore the Atomes of Water have different F. zgures 5 and 
yet not thofe of Salts, ; 
13. §. From the fame Experiment we may go upon good ground in 
Compounded Infifions 5 whether of Purgative, or other Materials. As 
not doubting, but that the fame Men/trunm may be highly impregnated 
with feveral Ingredients at once, whofe operative parts may be therein 
copioufly diffolved, without hindring either an Extrattion, or caufing 
a Precipitation one of an other. 
14. §. The Second Enquiry is, With what difference this Superin- 
pregnation of Water is made ? which I find confiderable. For a Soly- 
tion of above five Drachms of Noire may be fuperimpregnated with no 
lefs quantity of Sal Armoniac. And a Solution of five Drachms of com- 
mon Salt, may be fiperizpregnated with as much Nitre. Yet neither 
a {trong Solution (as of five Drachms) of common Sal/t,will bear above 
two Scruples of Sal Armoniac : nor will a {trong Solution (as of five 
Drachms) of Sal Armoniac, bear above a Drachm of common Salt : for 
if above the faid quantities of either of them be mixed together: they 
a both copioufly and forthwith precipitated to the bottome of the 
tafe. 5 
15. §. Whence, notwithftanding the former Experiment, yet are 
we admonifhed, not to infufe all manner of Ingredients in any propor- 
tion. Becaufe though fome do not, yet others will precipitate one 
another. 
16. §. The Third Enquiry was this, Whether the Solution of a 
fmaller quantity of feveral Salts, doth confit with the non-increafe of 
the Bulk of the Water 2 For this I took a Bolthead with a flender Neck, 
conteining about a pint and a quarter of Waters and diffolved therein 
‘ about 3)8 of Nitre. And marking the place to which the Water 
afcended in the Neck of the Bolthead: 1 then diffolved in the fame Wa- 
ter about a Drachm of Sal Gemme: which little quantity raifed the 
Water above halfan Inch higher then it was before. The like I ob- 
ferved in the addition of Netre to a Solution of Sal Armoniac. So that 
to fuppofe the variation of the sa/t doth prevent the increafe of the Bulk 
of the Water, is a manifeft Error. 
17. §. Fromthe fame Experiment it alfo appears, That the afcent 
of the Water upon a Supertmpregnation, is the fame, by whatfoever Salt 
the firlt Impregnation be made. For inftance, Let a Solution of Nitre 
afcend in the Neck of the Bolthead, fappofe, to 10 Inches, then add 
3/an Ounce more of Nitre, fo as to raife the Water, fappofe, 12 Inches 
or more, or lefs, according to the Bore of the Neck, In like manner, 
let a Solution of Sal Armonia reach to ten Inches : then add again half 
an Ounce of Nitre 5 and it will reach juft 12 Inches, or more or lefs, 
as before. 
18. §. The Fourth Enquiry is, What quantity of the feveral kinds 
of Salt, may be diffolved feverally in the fame quantity of Water : | 
that is tofay, by agitation alone, without the help of fires as I noted 
before. 

