fibre in a prepared state for bleaching, is subsequently calculated.
To make three tons of fibre per day, it is necessary to have four
boilers of 800 gallons each, and give five boilings in a day, or
1,650 lbs. of nett fibre for each boiler, or 6,600 lbs. for the four
boilers per day. After having put into the boiler a sufficient
quantity of water to cover the material, wait until the water begins
to boil, and then add the chemical agents.

lbs.
To the first boiling of a copper, put of soda 60
To the 2nd, 3rd, 4th, and 5th boilings of the same
copper, 15 lbs., each making 60
-----
120
-----
Therefore the four boilings will take of soda 480
The same liquid will serve for two other days, by
adding 15 lbs. to each fresh boiling, say, in the
whole, 40 lbs., or 600
It will consume in soda for nine tons made in three
days 1,080
Or 360 lbs. for three tons made in one day.

On the fourth day commence again in the same manner, and go on for
the two remaining days as above, producing eighteen tons in the six
days. The quick lime is to be employed in each of the boilings, in
the proportion of one-third less than the quantity of soda. Crude
soda may be used in the boilings, without previously discarbonising
it, and quick lime reduced to lime water; but, to render the action
of the chemical ingredients more quick and certain, it is better to
discarbonise the soda before it is put into the boiler. This may be
done by preparing in a small separate boiler the quantity of liquid
necessary for a day's consumption, which is prepared in about an
hour. The carbonisation is effected in the following manner:--

Ten parts of salt of soda. }
Six parts of quick lime. } In weight.
Seventy parts of water (never less.) }

_Boiling_.--This is a most important operation. By it the gluten and
coloring matter are separated from the fibres, which separation is
absolutely necessary, in order to prepare the fibre to receive the
bleaching. It is necessary to