The Seattle star. [volume] (Seattle, Wash.) 1899-1947, 1921-06-28
Wood Slave Pine
Best-KnOWn Water
Conduit
Selected Douglas Fir Used

used In dlnmeterB from sixteen
inches up tthc largest pipe yet con,
ntructcd being ono hundred ana
sixty.eight inches--il feet-inside
diametor,. The slaves are 80 miiled
that when assembled they form the
size OF pipe desired. In building up
the pipe. slaves OF different lengths
are laid side by side 70 that end
joints are broken. Each stave In
butted against the one Immediately
preceding IL, while saw kcrfs or
Sits at the ends receive a thin metal
tongue. thus making the stave con
tinuous and without any Joints In
the pipe. The smooth internal walls
and the absence OF joints In continu.
Gus stave wood pipe. combine to
make the carrying capacity OF this
pipe Considerably greater than that
OF any other type. The slaves are
held firmly In place By steel rods or
bands tightly cinched until every
stave II firmly seated. The pressure
under which the pipe is 10 serve
determines the diameter OF the bands
and spacing OF the same
IRRIGATION PIE
This pipe can be placed under
ground. below pillow depth. II cuts
off ali waste OF water by evApora-
ton or seepage. and besides. saves
right .of-way expense across ground
owned by others who do not want II
cut up by ditchea
IL W especially adapted TO pur-
poses Of orchard irrigation. as taps
can be made at each row of trees
and with a short hydrant the water
can be delivered wherever Il In 70
quircd II economies in the use OF
water. Having II below the surface
OF the ground. one can pillow. harrow
and cultivate over IL and not have
TO make n new ditch afterward-
CREOsOTED WOOD sTAvE PIPE
When pipe lines must be empued
during tho winter season. thus per
hitting the slaves TO dry out and
remain so for several months each
year. OF when the pipe Is used I'm.
der heads not sufficiently high to
insure saturation OF the slaves at
all times. or when the pipe Is used
as a fium~. culycrt or drain. Creo
Wood stave Pipe proves most salts.
factory.
In this pipe the slaves are treated
by a special Creosoting Process par
ticulariy adapted 10 the purpose.
This IN an added protection. prcrerv-
Ing the pipe during periods when
not In use, and also when subjected
during use to abnormaily severe
conditions.
crco. Wood Pipe In furnished IN an
standard sizes and heada
The Southern Pacific Railway
Company has found that creosoted
wood pipe eulverts put In place
twenty-five years ago are stiil FREQ
from decay and the wood b IN per.
feet condition. Creoeosed wood pipe
has n great . length OF life. II not
greater. than cart iron and much
greater than steel. while the cost
IL far icss. No painting or other
protective coating IL required
Iow.t Friciionsl Resistance: Con-
tinuous Wood stave construction
has been shown by tests OF the
United States Department OF Agri.
culture TO afford surface having
the lowest FRACTIONAL resistance to
Tow OF any water conduit: further.
more. Il was shown that the fric-
ton does not Increase with age as
is the case with metal surfaces.
Rightly and Alignment: Owing
to the rigid type Of construction
there IL no sag or DETECTION between
supports. perfect alignment and uni.
formity OF cross section being main
tanned.
Economy Of Sub-Structure: The
fume proper rests on specially de-
signed cradles on top OF the trestle.
eliminating n considerable portion of
the substructure ordinarily required
by fumes OF the suspended type.
Greater Carrying Capacity: The
design insures greater carrying ca.
pacity for a given diameter. or. con-
versely. a less diameter for n given
carrying capacity than any other
flume yet constructed.
Always water.Tight. The flume Is
easily kept water.tight at all times
by simply adjusting the steel bands.