[Integral marginalia:]
Dec. 29
1686.
[Retrospective marginalia:]
destill. of Tincal
& its gel glasse
1
Tbd
{ounce} i of
purifyd Tinkal & {ounce} i of Oyl of Vitriol, together
with {ounce} iv of Water, to dilute the one & to
facilitate the dissolution of the other, were put to distill in a small Retort
by degrees of fire, giving a strong one at last. The Event was, that there came
over some Ounces of clear Liquor, that was but weak &
space of 2 lines &
†af deleted then about {ounce} i by guess of a
deep red Liquor, which thô somewhat transparent in drops, was in the
<mass>replacing 'Glasse' opacous. That which remain'd in the Retort, & for whose
Sake
<principally>replacing 'the Experiment' the Distillation was made, amounted to about {drachm}
vi of very clear & colourless Glass,
<besides some> parts
<that>replacing 'of which' stuck so close to the inside of the Glass, that we could not
well separate them.
[Retrospective marginalia:]
good
Analysis of nitre (margin, on p. 191)
2
Tbd
D
To render the more probable some Chymical Opinions of mine, I
caus'd to be taken {pound} i of purify'd Salt peter, &
three pound of good White Clay, which being powder'd & diligently
incorporated with the Salt, the Mixture was put into a strong Hassian Retort,
& distill'd with a naked fire, gradually increas'd till at length it came
to be very strong. By this means we obtain'd about nine Ounces & a half of
very strong Spirit of Nitre, that emitted red Fumes into the upper part of the
Glass, thô it were closed with a Glass Stopple ground to it. The Caput
mortuum weighed {pound} iii & four ounces. So that in
Spite of all the Laborants Care, who endeavour'd to make the Experiment exact,
as He was told I intended it showed be, there wanted about ii {half} {ounce} of the four pound committed to Distillation.
And yet we obtain'd much more than is usually afforded, when the Distillation
is made with Earthen Long-Necks. For when the Laborant made the Spirit to sell
for His own benefit, He usually obtain'd but somewhat more than five ounces,
& seldom so much as six, out of a pound of Nitre. But the Phænomenon
I mainly intended in this Operation was such as I look'd for. Since thô
the Clay appeard