Gmilled January 1928.1,655,114.
Signed and sealed this 20th dav March, 1928.
It hereby certified that ror appears the printed speciHeat ion the above
numbered patent requiring correction follows: Page after line 57, strike out
the form ula and insert instead
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and the said Letters Patent should read witli this correction therein that
the same may conform the record the ease the Patent Office.
.
[ OORE,
Actiruj Vomrnitssioner Patents.
C tif tio . to
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