The Washburn times. [volume] (Washburn, Wis.) 1896-1976, 1910-07-21

various woods for the usual materials Will De
noted at each stage of manufacture.
Both soda and sulphate processes of treat
ment of the chips will be used and the lab
oratory will make it's own sulphite liquor IN
a vat adjacent to the digestors in which the
wood is cooked by steam until the lgnln is
all dissolved and only the celulose left
blast of high-pressure steam drives the chips
against the side Of the digestor, further d.
viding the cellulose f1bers, and then the whole
mass is pumped out by centrifugal pump
into a tank in which it Is stirred until the
fiber is still further broken up. Over and
over it is run through "rifher" troughs and
over screens where suction draws out the
fiber to be used and leaves behind the small
chips splinters and other waste.
When the liquor has been washed out OF
it in a washer driven by an electric motor "a
continuance much like the housewives wash
ing machine) it is put into press and the
water Is squeezed out of it. Such of the pulp
blocks from the press as are not wanted inn
mediately are then in convenient form to store
away on shelves
After going through the beating engines
the refined pulp is run on to the screens of the
paper machine and taken up by felt rollers,
from which it goes to wooden rollers and then
between metal rollers to the steam heated
driving drums where the wet sheet is run back
and forth until it is ready for the final smooth
finish of the hot steel caendering rolls. Any
grade of paper can he made on this machine,
from the toughest brown paper to fine cor
respondence paper, in running sheet 10
inches wide, and even a matchmaking device
is attached so that the impression can be
made on the wet sheet before it goes through
the rollers and on to the winding drum at the
end.
How to make timber last longer by protect
ing it with conservatives from the various
borers and fungous growths which attack
wood will be another important problem to
which considerable time and laboratory space
are to be given.
Beneath the building is great pit, heated
by steam to a temperature most favorable TO
rot and there in separate glass compartments
all about the walls, are to be samples OF tim
bers with the various fungous growths and
animal and insect enemies of the wood at
tached. The progress of their effect upon the
wood will be closely watched and compared
with that of the same pests upon samples of
the wood treated with different preservatives,
prepared and applied in the room above.
A big skylight and many windows make
the preservative laboratory an excellent place
to work and every facility is provided for test
ing the various forms of preservat1ves and
antiseptcs to protect timbers, such as those
in mines and waterfront piers, which are
much subject to the attack OF minute animals
and plants.
Into two great treatment cylinders the tim
hers are showed and steam pumps force the
oil from tanks above at high pressure into the
cylinders. When no more oil will enter the
cylinder even under $50 pounds pressure per
square inch it is drawn off and again returned
to the tanks and measured. The difference
between the amount drawn off and that origi-
nally forced in, deductng the oil collected