RF Annual Report - 1935 - The Rockefeller Foundation

92 THE ROCKEFELLER FOUNDATION
the Foundation's support of Dr. Clark's studies.
Two
previous appropriations were made for
these investigations: one of $75,000, available
over the five-year period beginning July 1, 1929,
and one of $7,500 made in 1934 for aid during
an additional year.
The studies center around a method developed
by Dr. Clark and his associates for the direct
study of living tissues, A double window in the
ear of a rabbit, or other suitable mammal, providing
a shallow serum-containing chamber, permits
the microscopic examination of growing
tissues, including nerves and blood vessels, and
observations on the reaction of such tissues to
various stimuli. Recently the method has been
used especially for investigating the growth and
certain developmental changes of nerves. The
technique is applicable, however, to a great
variety of problems in the normal and pathological
physiology of nerves and blood vessels,
and of connective tissues in general. The changes
which take place may be recorded by the cinematograph.
Harvard Infantile Paralysis Commission
Field Studies in North Carolina
The Foundation appropriated $5,000 to the
Harvard Infantile Paralysis Commission for a
field study, during the summer of 1935, of the
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