Tulsa daily world. [volume] (Tulsa, Indian Territory [Okla.]) 1905-1919, 1915-03-21
Thousands of Motorists Will Attend Both the California Fairs


Amazon region OF South America and
Is known as fine para. For over a cen-
tury this rubber has been gathered
in practically the same way. The ma
tive goes into the forest, selects tree,
cuts Nshaped grooves in the bark
with knife made for the purpose,
the grooves being cut in herriugbone
fashion around the tree, with one
main groove down the center Ike
the main vein in a leaf The latoN of
the tree not the sap flows from the
smaller veins and down the center
vein Into little cup placed TO re-
ceive II.
When the little cups are fun they
are gathered and brought into the
rubber camp and there the lateN Is
coagulated by means Of smoke, This
is done by the use Of a paddle which
is alternately dipped into bowl Of
the lateX and then rcyolvcd in the
smoke from wood or palm nut fire.
This smoke seems to have a proscrya-
tive effect on the rubber as well as
drying IL out and causing II TO harden
on the paddle, each successive layer of
the latcX causing the size Of the rub
ber ball or biscuit to increase. When
biscuit OF sufficient size has been
coagulated It is removed from the
paddle and Is ready for shipment TO
the various countries where rubber
products are manufactured
Another important grade Of rubber
coming from South America is CauCho.
This tree grows similar to the para
trees and the rubber is gathered i'm
a similar manner but Is cured by
adding to the lateN some alkaline So
luton and allowing the whole to dry
out, In almost any form, in the sun.
The value of this rubber can be great
ly improved by improved methods of
COagulatOn.
From Central America comes the
Castlloa rubber This rubber is gath
cred from trees in a very similar
manner to Para, and is coaEulated by
being mixed with juices which are
obtained by grinding up a certain
plant which grows in the castilloa
districts. After being mixed with this
plant juice, the castilloa Is spread out
in sheets on bun hides where it is al
lowed to dry in the sun, after which
the rubber is rolled up and is ready
for shipment. Castilloa is gathered
mostly from wild trees, but in Mex
leo it has recently been cultivated to
some extent.
From Central Africa and from
BorncO come the sO-Called African
gums, such as Congo, Soudan, Mas
Some Of these rubbers are gathered
from trees but most Of them from
vines and roots, and the methods of
COagulatiOn are varied. Practically
all of them are dried out in the sun.
These rubbeTs are all Of lower grade
that the para rubbers of South Amer
lea.
Cultivated Rubber.
The second class, or cultivated rub
bers, are obtained from East India,
Ceylon, Malayan peninsula and south
ern Mexico.
The chief and best among these is
the Ceylon rubber, which has been
grown mostly from sprouts taken from
the wild para rubber trees of South
America These cultivated rubber
trees have been very carefully reared
and scientific methods used in tap
ping them, so as not to, in any way,
hurt the bearing qualities of the tree.
The Ceylon product Is very uniform,
as very scientific methods are used in
coagulatng, drying and otherwise
treating the rubber before IT leaves
the plantation, so that there is a min
imum deterioration due to oxidation
and other actions during the time the
rubber is en- route from the plantation
to the rubber manufacturer. or late
far east rubber has been taking the
place Of South American product more
and more because plantation rubber
is cleaner and contains less foreign
matter with the wild para. As the
plantations in the far east are largely
in British countries and the rub
Der comes to us by way Of London,
this explains how the embargo was
possible. The cultivated rubbers
grown I'm East India and the Malayan
peninsula are similar to the CeylOn