The daily Cairo bulletin. (Cairo, Ill.) 1878-1???, 1882-11-28
T. pools for Farm Buildings.

T. Pools for Farm Buildings
The London BUilder says that tie
German government has on several oc-
casions pointed out to farmers and 9TH
ers interested in agriculture that too
great an expenditure Of capital on
buildings is mistake. With a view of
Illustrating the application of this prin-
ciple of economyto roofing, The Cologne
Gdzetfe points out that the system of
using tar for roofing purposes is at the
same time economical and suitable for
agricultural buildings, The framework
Of the root can be Of relatively slight
construction on account Of the nature of
the covering it is intended to support,
and the perpendicular height of the
roof can be one-eighth TO one-tenth of
the entire depth of the building. The
distance Of the rafters is arranged ac-
cording to the width of the covering
material, the scale being that from the
middle Of one rafter to the middle of
another, the distance should be "a
inches less than the width of tar roofing
sheets.
Immediately upon the rafters come
boards, and upon these Exactly in the
center OF the separate rafters) are placed
strong laths, about 2 inches wide. and
II inches thick, the upper edges being
taken of. The roofing sheets are now
placed SO as to cover the spaces between
the laths, and nailed Over the laths
are placed strips of paper, inches to
inches wide, fastened with nails at in
tervals Of q inches.
In order to make the sheets lie
smoothly upon the boarding it is sug-
gested in case they are too dry, to soft
en- them by immersion in water. 1t is
recommended that The workman should
not wear hesvy-nailed boots, and also
that If the rain comes on, the roof
should not be walked upon Immediately
after When the entire surface of the
roof is covered with sheets, the strips of
paper Tor capsl already named. as we'll
as the Joints, are painted over WIN
hot mixture of coal tar and pulverlzed
lime, Pure, dry sand is at once sprink-
led over this coating, and particular
care must be taken that all the nall
heads are well covered. When the paint
is dry the whole surface of the roofs
once more coated with the sa"'e HIN
ture, and is sanded. a., ID,
The object of this saIciui ueIhoo Vi
orarlo,,;ns, tho .Jot with several coat
;,s NY ySahlSlly-prepared solutions is
..ust, eserve in the tar those oeaginous
and fatty properties which it soon loses
If exposed to the air, and the retention
of which is an indispensable condition
Of its resistance TO water. Clay and
sand do not afford sufficient protection,
and they are removed by violent winds,
Reference is made TO various systems
Of coating the tar roof with protective
substances, for the purpose indicated.
One Of the most successful methods
consists OF mixture Of cowdung and
thin, white, lime, which is spread over
the entire surface of the roof If such
coating is not applied the tar paint
must, during the first four years, be an
nually renewed, which enhances the
cost of the roof If the last named pro-
tcctive composition is used, and renew
cd every two years, the coating Of tar
and lime can be dispensed with. Par
ticular mention is, however, made of n
coating of tar mixed with Portland CO.
ment, the tar being well heated aud
used in the proportion OF III pounds TO
200 pounds of cement The mixture
should be kept well stirred during the
preparation, and should be applied as
soon as made, This particular method
has been tried in many cases in Ger
many, and, according to the journal
quoted from, its satisfactory results
have caused its adoption upon a scale
of progressive importance.