Burlington weekly free press. [volume] (Burlington, Vt.) 1866-1928, 1905-02-09
TIMBER PERSONALITIES.
Erect Of Preliminary StcnMiWg AMI Ut
different PrcscrSntivc Chemicals
and proc ~sses upon Roth Green
and Seasoned Timber.

With the iucrca sing t,sc of timber, pre-
served III ono WY or another against
decay and tir". II is important to deter
mine the effect which tho preserving
process mas upon the strength of tho pre-
served timber. Many engineers believe
that crcoSotCd timber is more brittle and
less capable of withstanding strains than
the same timber before being treated
with "rcosotc. This is particularly true
with hri lEc limb, rs and liling.
Actual tests are necessary TO determine
what relationship exists between the pre-
scrVativc process and the strength OF
the timber. Most of III" tests hthcrto|
made with preserved timber were made
by comparing results of tests on treat
ed sticks with results ON uutrcatcd
sticks. lu many instances these turned
out in favor of the uutrcatcd timber. The
reason why such tests arc unfair 10 the
prcsCrvatiNe is that in the process of
preservation two iactors enter: % The
actual process of impre gnation with Il
| preserving substances. and CO The pro-
liminarv processes of steam seasoning.
| in III" minority OF treating plants IN tire
United States. piece of timber sub
scrucntly treated with crcosoic may 10
steamed to such an extent that the tim
l'r becomes exceedingly brittle. This,
clN iousIy. Will be the fault of the steam
ing and not Of the croosotc
! Timber preservation divides itsrlf
broadly into three stages: First. the pro.
lhninary preparation; second, the actual
prescrvntvc process: and. third. the
treatment of timber following preScrva-
ton. The final strength Of the timber
may be Influenced materially by each of
tho stages
rho bureau Of forestry has erected IN
oNtcnsiN" plant on the grounds Of the
St Louis exposition Tor carrying on a
series of Investigations Of the methods
for preserving timber. and OF the in
fuonc" various preventative process
have upon The strength of tie timber
I These ny cstiEhticrs hive been Organized
and outlined hv doctors Won Schrenk
and HIATT of tho bureau Of forestry.
This general plan was pursued ,lurin,
the last few months 1T the timber treat
lhg and testing station AT st. Louis in
accordance with the following outline.
This general plan was pursued during
: the last few months at the timber trca, :
; ing and testing station at st. Louis in
accordance with the following outlinr,
On To determine the effect of the pre-
lninary processes. such as steaming, on
the mechanical properties of the timbc.
90 TO determine tho effect OF preserva
| tiNos on the strength OF timber, clininat t.
ing the effect of the preliminary pro.
tcesscs.
Ia oidcr to determine the effect oi
these factors. the programme was li-
vidod into two parts-part ], the effect
of the preliminary process, aud part .
tho effect of personalities.
: The effects of the preliminary process:
were determined only on loblolly pine
Both green and seasoned timber was usof
in determining the effect of presorvativcy
The preventative fluids investigated in
Guided only creosote aud zinc Chord.
In making comparative strength test.
+ OF treated and un,roated timbcrs. II i
/ necessary 10 eliminate as far as possibl
n the variations due to the great difference
: in quality OF individual pieces of wood
: This was accomplished in this case h.
= using ll-foot timbcrs cut at the sam
g time from ono forest site. IN testing tn
= seasoning, Il foot section was cut from
+ ono end of each timber and sawed VI
. into t"st pieces. which furnished a basi
- of comparison between G. tn" results q
z tests on these control pieces and G
the results on test pieces takon from tn
: rcma ming S-foot section after the latte
# had been subjected to the various prc
@ lininary seasoning process in the treat
t ing cylinder.
y In testing tho effect OF prcservative
|. themselves the entire 1l-foot timber wa
q subjected to the preliminary scasonin
a processes, after which n 3-foot scctio
= was cut from the end of each timbc
IS Tho 3-foot section thus having been sub
icctcd TO tho preliminary seasoning pro
is ccsscs formed basis of comparison wit
9 tho remaining S-foot section, which WA
n treated with the personalities. In tn
= way tho separate effects of the prelim
Q, nary Hroccsscs and tho effects OF III
~ personalities could be isolated and d,
4. tcrmincd.
If Because Of an apprehension that d.
TX fccts of brittlcncss of treated timber