
—- fur Camp.— _,, 
Bee A Wocket ¥. 
i} Wire Hook. 
Protecting Canvas 
ECAUSE treatments designed to 
protect canvas against moisture 
and mildew do not, as a rule, prevent 
the injurious effects of sunlight on the 
fibre, the Bureau of Chemistry of the 
United States Department of Agricul- 
ture tried out the usual waterproofing 
mixtures with the addition of other 
substances for protection against sun-, 
light and found that earth pigments, 
such as are commonly used in paints, 
are effective. The protection consists 
in ¢onserving the strength of the fab- 
ric and undoubtedly this results in 
keening out the light. 
Since several pigments are suitable, 
there is more or less freedom of choice 

as to color. For a buff to khaki color, 
use yellow ochre; for a darker buff or 
light brown, use raw sienna; for dark 
red or reddish brown, use burnt sienna; 
for olive brown, use raw umber; and 
for a dark brown, use burnt umber. 
The formulas for waterproofing can- 
vas may. be used with the addition of 
one of the earth pigments, using one 
pound, either dry or ground in linseed 
oil, to each gallon of the prepared so- 
lution. Or one of the following formu- 
las may be used instead: 
Formula I 
Dark or yellow petrolatum. .8% pounds 
Beeswaxiendeats deere a. . 1% pounds 
CASONNGIS acoso Woe ea... 3 gallons 
ICTOSENCmEceetcieicioke sit n+ « =» 2 gallons 
Earth pigment (dry or ground 
in linseed oil), to each gal- 
lon of prepared solution. ..1 pound 
Formula II 
Asphalt (petroleum or Bermu- 
(LOZ) Marder na eer tele re, « 7% pounds 
Dark or yellow petrolatum 
(vaseline))ie era ccc at trates « 2% pounds 
(ep obbere =. So) >. i 3 gallons 
JOT OSEN Chaerneta ty sila oc hcudieay ess. + 3 2 gallons 
Earth pigment (dry or ground 
in linseed oil), to each gal- 
lon of prepared solution...1 pound 
The quantities given in the two for- 
mulas are sufficient for treating about 
40 square yards of canvas when 
brushed on one side and can be in- 
creased or decreased in proportion 
as required. Can- 
vas treated with 
Mixture II will 
probably be some- 
what more water- 
resistant than if 
ture I, but it will 
also be darker 
because of the 
asphalt. 
Since asphalt is 
usually cheaper, 
especially when 
used in large 
amounts, this for- 
mula may’ be pve- 
ferred. 
treated with Mix- — 
cometh de 
" 
frigate: S 
For canvas that remains in a fixed 
position, as, for instance, permanent 
wagon covers, boiled linseed oil con- 
taining 1 pound of pigment to the gal- 
lon can be used. This treatment stif- 
fens the canvas and is, therefore, not 
suitable for covers that are frequently 
folded. Lamp black was found to be 
one of the best protective pigments for 
use with linseed oil, giving the most 
flexible coating. Aluminum bronzing 
powder and, for a white color zine 
oxide are also good, but the latter stif- 
fens the canvas more than any of the 
other pigments tried. 

Mildewed Tents 
O remove mildew, whitewash the 
tent with a weak solution of chlo- 
rine of lime. Add salt to make it stick. 
A strong solution will rot the cloth. 
Two pounds of slacked lime to a barrel 
of soft water is the right proportion. 

Waterproof for Cordage Fabrics 
AKE of pulverized potash, alum 
and crushed acetate of lead, each 
20 parts, bicarbonate of potassium and 
Glauber’s salt, each 12 parts, and pour 
over this mixture 3,000 parts of soft 
water, all by weight. Also dissolve 
separately in an equal quantity of wa- 
ter 9 parts of oleine soap, and then 
mix both solutions. The articles are 
left in this solution until thoroughly 
saturated, allowed to drain, dried, 
brushed, and finally pressed. For linen, 
leather and wood, add margarine, 6 
parts, and for cotton or paper some 
gelatine, 3 parts, and resin, 6 parts. 
Impregnation with this preparation, it 
is claimed, does not injure the colors. 
Alum and sugar of lead alone, or alum 
and caoutchouc, can be used for the 
same purpose. 

Stiff Boots 
Ihe: prevent wet boots from becom- 
ing stiff, rub them with a good 
dressing of castor oil just before they 
are thoroughly dry. To soften stiff 
boots, soak them in water and treat as 
above. Never put wet boots near a fire 
to dry; they should be dried slowly. 
665 
