Boyle, Robert, New experiments physico-mechanicall, touching the spring of the air and its effects, 1660

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1contain'd Liquors were put into the Re­
ceiver, and that beginning to be evacua­
ted, the bubbles in all the three Liquors
began to appear.
The mixture of the
Spirit of Wine and Water diſcloſ'd a
great ſtore of bubbles, eſpecially towards
the top; but ſcarce afforded us any thing
worth remem bring.
The Spirit of Urine
appear'd to ſwell near an Inch and an half
above the mark; and beſides that, ſent
forth ſtore of bubbles, which made a
kinde of froth at the upper part of it.
And
above that ſpume there appear'd eight or
ten great bubbles one above another, in a
very decent order, each of them conſtitu­
ting, as it were, a Cylinder of about half
an Inch high, and as broad as the internal
cavity of the Neck: So that all the upper
part of the Neck (for theſe bubbles reach'd
to the top) ſeem'd to be divided into al­
moſt equal parts, by certain Diaphrag­
mes, conſiſting of the coats of the bub­
bles, whoſe edges appear'd like ſo many
Rings ſuſpended one above another.
In the Spirit of Wine there did ariſe a
great multitude of bubbles, even till
wearineſs did make us give over the Ex­
periment.
And in theſe bubbles two or
three things were remarkable; as firſt,

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