Balloon 183
double spiral 183
illuminated spiral 183
Winter, changed to Spring 26
Writing, mysterious 26
illuminated 28
burnt, restored 129
in the Dark, to make luminous 139
on Glass by the Rays of the Sun 148

ENDLESS
AMUSEMENT.

_To produce Fire by the Mixture of two cold Liquids._

Take half a pound of pure dry nitrate, in powder; put it into a retort
that is quite dry; add an equal quantity of highly rectified oil of
vitriol, and, distilling the mixture in a moderate sand heat, it will
produce a liquor like a yellowish fume; this, when caught in a dry
receiver, is _Glauber's Spirits of Nitre_; probably the preparation,
under that name, may be obtained of the chemists, which will of course
save much time and trouble.

You then put a drachm of distilled oil of cloves, turpentine, or
carraways, in a glass vessel; and if you add an equal quantity, or
rather more, of the above spirit, though both are in themselves
perfectly cold, yet, on mixing them together, a great flame will arise
and destroy them both, leaving only a little resinous matter at the
bottom.

_The Exploding Bubble._

If you take up a small quantity of melted glass with a tube, (the bowl
of a common tobacco-pipe will do,) and let a drop fall into a vessel
of water, it will chill and condense with a fine spiral tail, which
being broken, the whole substance will burst with a loud explosion,
without injury either to the party that holds it, or him that breaks
it; but if the _thick_ end be struck, even with a hammer, it will not
break.

_The Magic Picture._

Take two level pieces of glass, (plate glass is the best,) about three
inches long and four wide, exactly of the same size; lay one on the
other, and leave a space between them by pasting a piece of card, or
two or three small pieces of thick paper, at each corner.

Join these glasses together at the edges by a composition of lime
slaked by exposure to the air, and white of an egg. Cover all the
edges of these glasses with parchment or bladder, except at one end,
which is to be l