The Minneapolis journal. [volume] (Minneapolis, Minn.) 1888-1939, 1906-11-11

matter: from the fber.x The caustic
soda process,t which gives its name to
soda pulp, is used mainly for poplar.
|. 1.-The plant lof a Typical ssulphite pulp
mall consists of a. saw for cutting the
logs into a size easily handled, a. wood
preparing, or irossing, room, In, which
the bark is stripped Of, and a clipper
to reduce the wood, to small pieces for
the acid in the ;digester. The diigeste
plant mas tower, Jn which sulphur ll ! is Is
burned atstAs base. and the fumes pass
Which per eSI ts5
top: lThisr forms sui hlTous +eid, which
is drawn Of, into hs 4dh az fAsd With
chlps.,E Steam is stuEsRsed on unaer." pres
sure and the whole mass is Cooked
until sufficiently saigested, When. the
cooked e, pulp is. blown out and. washed
with water Osher processes fnllpW
and is squeezed thru power pressSH 10
remove :thes water. Is The pulp may may BE
then shipped to: the paper MILL. where
slttEis bleached and etherwise pfepared
for: specialguses, or TO: factories which
make, use of the material in the manu- Iii
facture Of pals, dishes, boxes, picture
{ frames, mattings, carwheels, steam and
water pipes, telegraph poles, electric
cSonduits, insalators,s collins, shoe heels,
noIeyh toG handles bgtt9ns
splints, astronomical observatory s dom dome
.dlHlcult or expensive ito =bleach. ..hs.sg
-Four hundred foramoFe raw materials
are used in the manufacture of paper
pulp, but wood furnishes BY far Che
greater quantity. f9s M any sIG American
woods have been tried including
spruce, poplar, Eastwood, balsam, pine,
beech, willow, cedar, hemlock, maple,
birch and aspen. of these spruce is
most used; Balsam.:is also good. Both
are valuable for their special quality
OF hber and for their lack Of color, be-
ing nearly white and, therefore not
difficult; or: expensive to- bleach.
10 arrive, at definite conclusions as
to the various pulpwoods and how to
treat them the forest service has es-
tablished at 696 East First street, Bos-
ton, Mass, laboratory for the pur-
pose OF making Investigations and ex-
perimentsi in the manufacture Of sui
phlte woodpulp., j. .,..15..
Even with the seemingly exhaustless
spruce forests of Canada, in addition
to those of stherSUnited States, it does
not need an expert statistician to fore
see the day, not. far in the future. when
the spruce pulp supply will, be ex-
hausted, or at least SO depleted that the
cost OF. the wood will be prohibitive.
Therefore principal object Of the for
est service laboratory. is to. experiment
.oother. woods. with reference to obtain
ing, first, a pulp that will approximate
spruce pulp to supplement- it; second,
other hbers that may have qualities PEE
cutlariy adapted to special kinds Of
papermaking; third, a pulp Of market
able value as by product from the
waste material Of numbering and mill
ing operations.
i So far there seem to be more posi-.
'bllities in balsam than in any other
wood. Yet the, most interesting pos
slbllltles lie in the line Of discovering
other fbers that may have properties
peculiarly adapted to special kinds of
paper making. Here the realm Of CON
lecture iseas bewildering as it is broad,
for few countries can present greater
va OF, woods than the United
STATES and it's possessio ns. Special
supply the basis for special papers. :ur. h.
til there may indeed Be brought about
~ paper age, as a German scientist
has predicted, wherein al. vegetable
hbers will find place in making boards,
bricks, holdings and nearly all struct-
ufal materials. Here, too, there is op-
portunity for utilizing wood waste. saw.
dust slabs, and edaings all 10 be
,' iiie1oe iuto pup, ana Lnence Into finished
paper product s s. e. ~. a @
The forest service experiment sta
ton is conducted in. connection with
model plant fully equipped. The sam
pies of wood used will be collected by
members of the forest service in order
that there may be no question as to
their . en- tifcation, and hen treated in
every way as sifain Mgular pull III,
sulphite pulp will thug .aa spss
The fbers will be studied inieroscopi.
7cally, and zgeed-sized samples of the
pulp will be distributed among paper
manufacturers, SO they may judge Of
their usefulness for general or specific
purposes. l5'. 81 rs sc
More than / 500, 600 cords of wood
are used annually in the production
Of sulphite pulp. and Of this nearly
four-ffths j. Lpruce. With such an