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643.

Pitch four ounces virgin wax, four ounces incense, two ounces oil of
roses one ounce.

644.

Four ounces virgin wax, four ounces Greek pitch, two ounces incense,
one ounce oil of roses, first melt the wax and oil then the Greek
pitch then the other things in powder.

645.

Very thin glass may be cut with scissors and when placed over inlaid
work of bone, gilt, or stained of other colours you can saw it
through together with the bone and then put it together and it will
retain a lustre that will not be scratched nor worn away by rubbing
with the hand.

646.

TO DILUTE WHITE WINE AND MAKE IT PURPLE.

Powder gall nuts and let this stand 8 days in the white wine; and in
the same way dissolve vitriol in water, and let the water stand and
settle very clear, and the wine likewise, each by itself, and strain
them well; and when you dilute the white wine with the water the
wine will become red.

647.

Put marcasite into aqua fortis and if it turns green, know that it
has copper in it. Take it out with saltpetre and soft soap.

648.

A white horse may have the spots removed with the Spanish haematite
or with aqua fortis or with ... Removes the black hair on a white
horse with the singeing iron. Force him to the ground.

649.

FIRE.

If you want to make a fire which will set a hall in a blaze without
injury do this: first perfume the hall with a dense smoke of incense
or some other odoriferous substance: It is a good trick to play. Or
boil ten pounds of brandy to evaporate, but see that the hall is
completely closed and throw up some powdered varnish among the fumes
and this powder will be supported by the smoke; then go into the
room suddenly with a lighted torch and at once it will be in a
blaze.

650.

FIRE.

Take away that yellow surface which covers oranges and distill them
in an alembic, until the distillation may be said to be perfect.

FIRE.

Close a room tightly and have a brasier of brass or iron with fire
in it and sprinkle on it two pints of aqua vitae, a little at a
time, so that it may be converted into smoke. Then make some one
come in with a light and suddenly you will see the room in a blaze
like a flash of lightning, and it will do no harm to any one.

VII.

PHILOSOPHY AND HISTORY OF THE ART OF PAINTING.

The relation of art and nature (651. 652).

651.

What is fair in men, passes away, but not so in art.

652.

HE WHO DESPISES PAINTING LOVES NEITHER PHILOSOPHY NOR NATURE.

If you condemn painting, which is the only imitator of all visible
works of nature, you will certainly despise a subtle invention which
brings philosophy and subtle speculation to the consideration of the
nature of all forms--seas and plains, trees, animals, plants and
flowers--which are surrounded by shade and light. And this is true
knowledge and the legitimate issue of nature; for painting is born
of nature--or, to speak more correctly, we will say it is the
grandchild of nature; for all visible things are produced by nature,
and these her children have given birth to painting. Hence we may
justly call it the grandchild of nature and related to God.

Painting is superior to poetry (653. 654).

653.

THAT PAINTING SURPASSES ALL HUMAN WORKS BY THE SUBTLE CONSIDERATIONS
BELONGING TO IT.


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