The diamond drill. (Crystal Falls, Iron County, Mich.) 1887-1996, 1909-01-30

common use are mercuric chloride.
moIasses. copper sulphate and mix
ture OF zinc and creosote.
Zinc chloride Is obtained by disoIv-
ing ordinary zinc in hydrochloric acid.
This is diluted with water at the time
OF its use. Creosote as preventative
Is superior to zinc chloride in the fact
that IL is not leached'out by the motion
OF water. Zinc chloride is, however.
the cheaper and Is suitable for use in
comparatively dry situations.
The actual cost Of impregnation de-
ponds largely upon the timber in use,
the labor. the preventative, the cost OF
the apparatus. and the depth of pene-
tration desired Porous woods are
more easily treated. but absorb more
of the preventative. II is preferable.
however. to utilize such species as
willows. cottonwood. elm. etc. rather
than those containing very small peri
centage of sapwood. From five to fif-
teen cents post may be considered as
the usual cost OF treating by the diff
ferent methods. Generally speaking,
the more expensive method is the
cheaper in the long run.
1t has been proven by experiments
that in the use of white cedar, as we'll
AS soft wood posts, il they are treated
by the creosote or zinc chlroide process
saving OF from nine to twenty dollars
per annum may be effected where as
many as Thousand posts are utilized.
Furthermore, new posts will only be
necessary at intervals of from twelve
to eighteen years instead Of from five
TO eight, as is the case when untreated
Results from three methods worked
out in actual practice are as follows
Figures showing annual saving by
treating 1000 white cedar posts with
creosote.
Tank Treatment.
Cost OF post. untreated,
life years 10
Cost Of post treated, life
Is yrs. o
Annual charge 4 per cent
compound interest .O4O6 .O27l
Annual charge for renewal
at cost Of sc for placing Obs .0045
Total annual charge .O54l 03i6
.03l6
Saving on / post .0225
Saving on 1000 posts S92 90
Figures showing annual saving by
treating 1000 white cedar posts with
Creosote.
Brush Treatment
Cost of post, untreated,
life yrs 10
Cost of post, treated. life
years 30
Annual charge per cent
compound interest 0406 l0362
Annual charge for renewal
at cost OF &c for placing Obs .O090
Total annual charge .O54i 0453
0452
Saving on / post .0452
Saving on 1000 posts s.. 90
Figures showing annual saving by
treating 1000 white cedar posts with
Zicn chloride.
Tank Treatment.
Cost OF | post, untreated.
life yrs. 10
Cost of post treated, life
10 yrs. .25
Annual charge per cent
compound interest .0406 .033S
Annual charge for renewal
at cost OF sc for plac-
ing Obs .C0i9
Total annual charge .054l .O4O6
.0406
Annual saving on post .0l35
Annual saving on 1000 posts sl3. so
When the average farmer wishes to
treat posts, an ordinary oil tight barrel
will suffice. instead Of an iron tank.
A good sized iron pipe with a cap on
its Souter end should extend out from
! the barrel near it's base about three or
four feet. The barrel Is filled with
posts and preservative. a fire built un-
der the outer end of the pipe which
meats the oil After allowing the
posts TO remain in the hot bath for the
proper time. IL Is an excellent plan TO
have another barrel nearby partially
filled with the cold preventative, and
plunge the posts Immediately into this,
rather than allowing them to remain
in the hot bath and slowly cool down.
Farmers and stock men desiring to
obtain further information along this
line should write to the Forestry De-
partment. OF the State Agricultural
IL. 4