The Richmond Virginian. (Richmond, Va.) 1910-1920, 1919-08-22

with the sile-Alling season ape
preaching. = careful examination OF
slips, followed BY necessary YepAjro.
WIN help 10 improve the keapiqs
quality OF the coatentA Asask4tpk y
studies Of the Unf3sd Dk9t1 ~ m.
naent Of aeficuituf4 Asriki el4e 1870
are the chief peaclrspae /; 40.
hole may ]. spoil i several hundred
pounds OF siiase. IN the cas- * woods
stAve siios the hoops ana bra6ea
should receive attention 10 insure Close
fitting.
Silos made Of concrete. brick ~
other material Ct porous Or sesniroy-
GUS nature. are benefited By an ineaae
coating Of q preparation which seAta
the pores and also prevente Tho ACTION
OF siiaGe juices on the wa1ia :. Il &.
The coating most coibnnonty used
4hithcrto 10 coal tar thinNAd With $500
line and applied with 4 pAint brush.
a number of materials OF Ike nature
have BEEN considered for this work.
but the one showing the inest promase
10 parafiin.
Parafsin may be applied either cold
or hot to stlo walls. With the cold
method. the parafnu ID dissolved n =
volatile carrier like naphtha until q
saturated solution 10 obtained. Four
pounds Of pArafiln dissolved IN one
make one gallon Of this solution. The
solution Is then applied much like
paint to the surface Of Inc concrete.
which Il penetratea, according 70 dry
ness and porosity. One gallon has q
covering capacity Of about 400 square
feet.
Tn. naphtha soon evaporates, ieav-
ing the parafiin in the holes. when
applying the parahin ~ this method.
special care must be taken tlsat there
is good ventilation In the silo and thai
there are no lights or fires nearby
Naphtha a very infiammAhle. and 2
serious explosion or Thrs may result
from careless use.
Parafnn may also. be applied N
melted form. II requires six and one
half pounds Of parafln TO make one
gallon OF the hot pAramn solution.
day. and the concrete must also b.
sufYieientiy warmed ~ ARTIFICIAL heat
10 that the paraSin may be thoroughly
rubbed In. One gallon win cover
about $50 square feet Of -QsYfAcAy
When this method h followed. blow
torch should be used to warm the
walls ~ the parafin 10 being applied,
and also 20 thin and spread the layer
OF 'parAfi1n. TWO buckets Of parafEln
should be used. one TO b heating
while the other - being applied. The
hot -paramn treatment n one Of the
most successful for waterproollng sur
faces exposed to weather. but II re-
auires some experience to obtain sue
cesaful results.
The aanount Of parafiln required TO
coat 4 aiio may be determined In
the following manner:
Multiply the height Of the stlo By Ito
circumference (the circumference -
the diameter multiplied By 1i4l61.
which gives the number Of square fest
Of surface on the inside OF the s11O.
II the cold method n to. be used.
divide the result Just obtained, ~
800. which gives the number Of gal
Ions OF the paraf1in -naphthA solution
required. Multiply this result By the
amount Of parafin and naphtha In
each gallon TO obtain the total ma
terials required.
Where the hot method 10 used,
divide the number Of square feet Of
silo wall to be coated b. $50 to md
the required number Of gallons. Mui-
tiply this result by six ana ons-hAIf
to obtain the number Of pounds OF
parafan required. For example, TO
ind the rarahln required to coat