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roses, twenty drops; orange flower essence, one ounce; oil of
rosemary, thirty drops; oils of bergamot and neroli, each one-half
If you wish to make a small quantity of any of the above perfumes, use
small quantities of the ingredients, preserving the same proportions.
TO WRITE SECRET LETTERS.
Put five cents' worth of citrate of potassa in an ounce vial of clear
cold water. This forms an invisible fluid. Let it dissolve, and you
can use on paper of any color. Use goose quill in writing. When you
wish the writing to become visible, hold it to a red-hot stove.
TO PRESERVE FLOWERS SO THAT THEIR
BEAUTY WILL LAST FOR YEARS.
Make a strong solution of gum arabic, two ounces of the gum to one
pint of boiling water; shake until dissolved; then take your flowers
and immerse in the solution, taking care that every part is well wet
with the solution. When dry, repeat the operation. Do this three
times. Flowers treated thus will last for years.
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