5
Up to this time the extract
had been given intravenously
we found that this
extract when given
subcutaneously gave
a slower and more
prolonged but not as
marked fall in percentage
of blood sugar.
In the endeavors
to secure a sterile extract
we next tried the effect
of preservative. We found
that .7% tricresol, which
is double the strength used
in preserving Diphtheria
antitonixin did not interfere