with a paper that is
pasted only at its extremities.

When this print is exposed to a moderate fire, or the warm sun, the
foliage, which appeared covered with snow, will change to a pleasing
green; and if a yellow tint be thrown on the lighter parts before the
invisible ink is drawn over it, this green will be of different
shades. When it is exposed to the cold, it will again resume its first
appearance of winter.

_The Silver Tree._

Dissolve an ounce of fine silver in three ounces of strong aqua
fortis, in a glass bottle. When the silver is dissolved; pour the aqua
fortis into another glass vessel, (a decanter will be best,) with
seven or eight ounces of mercury, to which add a quart of common
water; to the whole add your dissolved silver, and let it remain
untouched.

In a few days the mercury will appear covered with a number of little
branches of a silver colour. This appearance will increase for a month
or two, and will remain after the mercury is entirely dissolved.

_The Lead Tree._

A more modern invention, and an easier method by far than the above,
is the following:

To a piece of zinc fasten a wire, crooked in the form of the worm of a
still; let the other end of the worm be thrust through a cork. You
then pour spring water into a phial or decanter, to which you add a
small quantity of sugar of lead; thrust the zinc into the bottle, and
with the cork at the end of the wire fasten it up. In a few days the
tree will begin to grow, and produce a most beautiful effect.

_To produce beautiful Fire-works in Miniature._

Put half a drachm of solid phosphorus into a large pint Florence
flask; holding it slanting, that the phosphorus may not break the
glass. Pour upon it a gill and a half of water, and place the whole
over a tea-kettle lamp, or any common tin lamp, filled with spirit of
wine. Light the wick, which should be almost half an inch from the
flask; and as soon as the water is heated, streams of fire will issue
from the water by starts, resembling sky-rockets; some particles will
adhere to the sides of the glass representing stars; and will
frequently display brilliant rays. These appearances will continue at
times till the water begins to simmer, when immediately a curious
aurora borealis begins, and gradually ascends, till it collects to a
pointed flame; when it has continued half a minute, blow out the flame
of the lamp, and the point that was formed will rush down, forming
beautiful