Evening star., 1926-08-22
RUBBER EXPERTS
TO MEET IN i. S.
All Phases of Industry Will Be
Discussed by World Lead
ers at Philadelphia.

Rubber, one of the most active sub
5ects in the automobile world for the
past two years, will come in for far
reaching consideration in all Of it's as
poets at a world raw rubber sympo.
SUM at the golden jubilee meeting OF
the America Chemical Society. to be
held in connection with the Philadel-
phia Sesquicent ennial Exposition dur
ing the week Of September 6.
Experts from Great Britain and
Holland, the two nations which at
present control the world raw rubber
supply. will address the sessions
DR.. A. van Rossem of Delft, Hol-
land. internationally known for his
work on raw rubber for the Dutch
rubber interests, will describe develop
rnents in the technology Of rubber on
the Dutch plantations and in the re
search work in progress at Delft.
British Expert Coming.
Dr. Henry P. Stevens of London,
consultant for the British Rubber
Growers Association. an investigator
who is said to have turned out an i'm
mense quantity of important work. is
to deliver an address on Recent De
velopments in the preparation of
Plantation Rubber" which will show
the activities of the British investi-
gators
Ernest Hopkinson, New York, vice
president of the United States Rub
Der Co. will discuss the Botanical
and Chemical Developments in the
Plantation Industry" with particular
reference to the work in progress on
the Plantations Of the United States
Rubber Co.
The Chemical Society's announce
ment calls attention to recent expan
sion Of plantations controlled by
American interests.
Reclaimed rubber, a valuable sub
etitute for new rubber and playing
an important part In conserving the
world supply, will be dealt with by
DR.. L. E. Weber of Boston. under the
title, The Present and Future of Re
claimed Rubber"
Talk Upon Raw Rubber.
W. B. Wiegand, New York physi-
cfst, will discuss from a critical point
of view the physical properties of raw
rubber and of vulcanized rubber in A
paper on "A Comparison of the Phys
teal Properties Of Raw Rubber With
Those Of Compounded Vulcanized
Rubber"
There always is the possibility Of
producing new substances, not neces-
Sary similar in properties to vulcan
lied rubber, which will replace rub
Der for various uses and be superior
physically and economically" the so
ciety's statement continued This
suggestive topic of alternative ma
terials for rubber Is to be presented
by DR.. E. B. Spear of Pittsburgh and
will doubtless offer an entirely new
point of view to many
With rubber now an indispensable
material in industry and daily life, it
is OF interest to survey it's economic
status, the present lack Of alterna-
tive materials and the economic ad-
vantages OF a native supply. This
subject will be discussed by DR.. A. d
Little of Cambridge, Mass
With the growing interest in Guav. |
ule as a potential source of rubber, !
1t is particularly opportune to hear |
addresses by G.. H. Carnahan, presi. |
dent of the Continental Rubber Co.
on The Botany and Agricultural |
Problems of Guayule Rubber and |
by DR.. David Spence, vice president |
OF the same organization, on The
Chemistry Of Guayule.'
Africa and Tropical America.
Likewise Brazil and Africa at any
time may assume an important posi-
ton in the growing Of rubber, sub
1ect which will be discussed by DR.. II.
n. Whitford Of the Rubber Association
OF America In paper entitled Wild
and Plantation Puhbers Of Africa and
Tropical America Most American
rubber chemists are little familiar
with this subject
The subject Of synthetic rubber.
which is always Of interest, will be
discussed by recognized authorities.
In improving the quality of rub
Der fundamental knowledge of the
physical and chemical properties of
raw rubber is essential to scientific
experimentation. For this reason a
study of the physical structure of
lateX and of raw rubber by means
or the microscope. which will be de
scribed by r. P. Dinsmore Of the
Goodyear Tire and Rubber Co, will
contribute toward a better knowledge
OF the properties of rubber
Furthermore, IT is little realized
that X-rays offer a ready and an exact
method OF studying the ultimate struc-
ture Of rubber. Prof George L. Clark
OF the Massachusetts Institute of
Technology. who has probably investi.
gated this field to a greater extent
than any other worker, will describe
his work on the structure of rubber
as revealed by X-rays
The symposium will offer a com
prehenslve survey Of all botanical
chemical and engineering develop
nnents which are taking place or are
likely to take place"