102 
January 17, 1920 
The RURAL NEW-YORKER 
EASY TO 
ADJUST HOOPS 
Unadilla Silos 
Convenient and 
Easy to Feed From 
T HE Unadilla Silo is the most con¬ 
venient silo, recognized as such by 
experienced dairymen and stockmen. 
Twice a day for 6 or 7 months you or your man 
climbs the silo. Twice a day for the same period 
silage must be forked out, 30 to 60 pounds per 
head. Tons of silage must be handled by hand. 
The Unadilla Silo is the only silo that pro¬ 
vides for your convenience perfectly—day in and 
day out. 
A patented door fastener ladder, rungs wide 
enough, only 15 inches apart, providing a reliable 
tread, staunch and ever-ready, makes going up or 
coming down easy for man, boy or woman- It 
makes tightening of hoops at the door front a few 
minutes’ easy, one-man job—that cannot 
easily be neglected. 
Air-tight doors push in and slide up or down— 
easily and always. They can't stick or freeze in. 
This makes entrance into the silo safe and easy. 
It makes silage forking simply silage dumping 
at a door level. No back-breaking forking, 
waist high, or overhead. 
These are advantages yoirmust not overlook when 
purchasing a silo that will last a generation and 
be’in use 300 to 500 times a year. 
The UNADILLA has many other exclusive fea¬ 
tures. Many years of specializing in one product 
produced them for you. * 
A big, well-illustrated, facts-full catalog, with 
early-order discount offer, comes free on request. 
Send today. 
Good agents can have a few open territories. 
Unadilla Silo Co. 
Box C. 
Unadilla, N. Y., or 
Des Moines, la. 
AT 5 , 
BIG DAIRY 
3edar Rapids 
| Speed Gov¬ 
ernor con- 
r|] Jl^ trola speed 
Lof machin- 
~ ary like separator. J ■ 
chum, fanning mill, washing 
machine. Changes speed of any or 
all instantly while In motion. Fine for 
Dept. 37 
Cedar Rapids, 
Virginia Farms and Homes 
FKKE CATALOGUE OK SPLENDID BARGAINS. 
K. B. CHAFFIN' A- CO., luc., It Ichmoiul, Vo. 
FERTILIZERS AND CROPS by Dr. L. L. Van 
Slyke, Price, $2.50. The best general 
farm book. For sale by Rural New-Yorker 
How About It? 
Are you going to install a modern 
water supply system this year, or 
will you be obliged to pump and 
lug water by hand for another 
year? 
lHERE’S 
% 
T HERE’S a lot 
be had from 
of convenience to 
a Hoosier Water 
Supply System. It benefits every 
member of the household, eliminates 
drudgery, and provides a worth-while 
comfort. 
Any form of power may be used for 
operating a Hoosier System—gasoline 
engine, electric motor, or windmill. 
We supply motors which will operate 
from farm lighting plants. Hoosier 
Systems are easily installed and easily 
operated. 
The interiors of Hoosier water 
service tanks are treated with 
a rust resisting preparation, 
which prevents rust and water 
contamination. 
Send today for Bulletin F 
and become acquainted 
with Hoosier Systems. 
FLINT & WALLING MFG. CO. 
Dept Y Kendallville, Indiana 
Tanning Pigskin 
Would yon inform me how to tan a 
hog's skin for the purpose of tapping 
rubber boots? A. D.M. 
Smyrna. N. Y. 
The tanning of leather is a complex 
proposition, aiul to master the subject 
would require a lifetime, of study and ex¬ 
perience. There are hundreds, and per¬ 
haps thousands of methods, any one of 
which will give good results under its 
own proper conditions. But they vary 
somewhat in general efficiency, and the 
principal factors in determining the de¬ 
gree of efficiency are the kind of skin 
that it is desired to tan, and the kind of 
leather that is it desired to produce. Thus, 
while a certain method may give better 
I’esults than any other when applied to 
tanning a fox skin, and will give good 
results with the skins of all other fur¬ 
bearing animals, a slight variation will 
give better results with a skunk skin, and 
still another with a rabbit skin, and so 
on throughout the list. The variations 
have not all been worked out. and it is 
useless to discuss them at length. 
But sole leather is always tanned by 
the bark process, no matter what may be 
the kind of skin that is used. Even here 
there is some variation in detail, but es¬ 
sentially, the method is as follows: If 
the skin is dry or salted, it is soaked in 
water until soft and freshened, and then 
in lime water until the hair will “slip"’ 
easily. Then it is scraped on both sides, 
with a blunt-edged knife, to remove the 
hair from one side, and any fleshy tissue 
from the other. When free from these, 
it is given a bath iu a weak sulphuric 
acid, to remove all traces of the lime. 
Then, in case but few skins are to he 
tanned, a quantity of bark is ground, or 
otherwise broken into pieces no larger 
than a pea, placed in a barrel and leached 
with hot water, the water being poured 
back into the barrel and run several times 
through the bark. This is to extract the 
tannin, which is the active principle in 
this method of tanning. A somewhat dif¬ 
ferent method is, of course, adopted when 
the business is conducted upon a com¬ 
mercial scale. 
Then the water from the leach is placed 
in a vat. or tank of sufficient size, and 
clear water is added until the hydrometer 
indicates a density of about 310. If a 
stronger liquid is used, the hides will 
soon be completely tanned upon the out¬ 
sides, and prevent the tannin from pene¬ 
trating to the interior. Apparently as 
good leather will result, but, when put to 
use, as soon as the outside has worn off. 
only the untanned skin will remain, and 
this will wear away like pasteboard. But 
the skins are put into the weakened solu¬ 
tion, and lifted, and stirred several times 
a day. the oftener the better, for a month. 
Then they are removed, scraped ou both 
sides, a stronger solution is made to 
which they are returned, and stirred fre¬ 
quently for another month. And this 
process is repeated each month until the 
tanning is completed. With cattle hides, 
from six to 30 months are required, hut. 
with a thin skin, like a hog skin. I 
should estimate that four months would 
be sufficient. 
When the tanning process is complete, 
the hides are taken from the liquor, and, 
in large establishments, they are passed 
between heavy rollers, but, upon a small 
scale, they may be pressed between 
weights. Then they are hung up and 
dried. With cattle hides, the entire pro¬ 
cess requires from eight to 32 months, 
but. in the case of the thinner hog skin, I 
should think that six months would be 
amply sufficient. The quicker methods 
used in tanning the uppers or soft shoe 
leather do not produce sole leather, except 
upon the outer surfaces of the hides. I 
have no knowledge of leather of this kind 
being used for this purpose. But, speak¬ 
ing generally, from wliat I know of the 
nature of hogskin leather, I should say 
that it would give good satisfaction. I 
presume that it may be fastened in place 
by the use of ordinary rubber cement. 
The bark of every tree contains tannin, 
but there seem to be but very few kinds 
that contain it in sufficient quantity and 
purity to allow the profitable manufacture 
of a high grade of leather, and oak or 
hemlock are the varieties almost uni¬ 
versally used in the United States. There 
is practically no difference in the wearing 
qualities of leather made by the use of 
either bark, but that made with oak bark 
has a greater tensile strength, and is 
somewhat better for harness work. Oak- 
tanned leather lias a light yellow color, 
while that tanned with hemlock bark has 
a brown color, combined with a strong 
reddish tinge. c. o. ormsbee. 
0 
Tanglefood; Waterproofing for Boots 
On page 3700 you give A. F. K. a for¬ 
mula for sticky flypaper, but this differs 
from that given by the Scientific American 
as the composition of tanglefoot, which is 
castor oil and pine tar. Same paper gives 
“I)ri-float.” the preparation for water¬ 
proofing boots, as cod liver oil and pine 
tar. j. L. P. 
New York. 
Ask yourself, “How will my silo 
look after ten years?” Then learn 
the age of some of the thousands of 
sturdy, good-looking Green Mountain 
Silos dotted over the country. They 
“grow old gracefully.” 
Green Mountain Silos, with the 
popular new hip roof, are fully de¬ 
scribed in our interesting new 1919 
folder. Write for free copy today. 
You’ll always be glad you did so. 
The staves of the Green Mountain 
are of thick, clean lumber, dipped in 
creosote oil preservative. Grooves 
and joints are made to stay tight— 
and they do. 
The hoops are of extra heavy steel, 
with easy-fitting rolled thread. They 
stand the hardest strains. 
The patented Green Mountain door 
is simple and tight—it fits like a re¬ 
frigerator door and keeps the silage 
sweet and palatable. 
The novel Green Mountain anchor¬ 
age system prevents warping and blow¬ 
ing over—“it holds like Gibraltar.’’ 
Get the whole Green Mountain 
story by sending for the free folder 
—right now. 
CREAMERY PACKAGE MFG. CO. 
338 West St.. Rutland, Vt. 
GREEN 
MOUNTAIN 
SILOS 
Can't Pnnctnre 
Can't Blow Out 
No tube, no pumping, no 
delays. Dayton Airless look 
and ride like pneumatic tires 
but are absolutely trouble 
proof. 
8,000 MILES 
GUARANTEED 
They wear until they are 
worn clear through. Ten. 
twenty, thirty, and even 
forty thousand miles are 
the records «f users. 
Made in 30x3, 30x3 
and 30x4 inch sizes only. 
Write for Prices and Booklet. 
THE DAYTON RUBBER MFG. CO. 
DEPT. 169 DAYTON, OHIO 
For the Land’s Sake—Use Bowker’s 
Fertilizers. They enrich the earth and 
those who t 11 i*.—-.-I dv. 
Save Yz 
yip Feed Bill 
and raise better cattle and hogs. Fatten them in one- 
ouarter less time. Increase the milk supply 25#. One- 
third of the rum feed is undigested. Blue ribbon 
winners are fed cooked feed prepared by 
Rippley’sj 
Steam 
Feed 
Cooker 
and Heater 
Will boilbbl. water in 20min. 
or cook 25 bu.feed in 2 hours. 
Will heat water in tanks 200 ft. 
away, by attaching pipes to water Jacket: will heat hog 
houses, poultry brooders, etc. Used by 25 State experi - 
ment stations. Writefor free catalog of Breeder’s and 
Poultry Supplies. 
Rippley Manufacturing C®., Craft®n, Ill. 
New York Office, - - 55 Liberty Street 
[ 
When you write advertisers mention 
The Rural New-Yorker and you’ll get 
a quick reply and a “square deal. 99 See 
guarantee editorial page . : : : 
