The brown sugar is first mixed with a very small quantity of boiling
water, just sufficient to form a thick pasty mass, which is put
into conical pots (figs. 1 and 2), and allowed to drain, the small
quantity of water washes out only the brown part, and leaves the
crystals pretty white; they are then dissolved in water, mixed with
some bone-black and bullock’s blood; the bone-black is the charcoal
from burnt bones, and has the power of taking away the color of
most vegetable solutions, the bullock’s blood is used as affording
a cheap kind of albumen, which when the solution of sugar is boiled
coagulates and entangles all the floating matters so that they may
be removed by filtration.
Illustration: VACUUM-PAN.