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Proofing
['pru:fiŋ]
Examples
In
moulding
pulp
into
articles
of
manufacture
,
satisfactory
machines
have
been
invented,
not
only
for
the
mere
forming
them
into
shape
,
but
for
water
-
proofing
and
indurating
the
same
.
William Henry Doolittle.
Inventions in the Century
.
Edited by Alexander
