To Know When Yeast Is Good Or Bad
When you perceive your yeast working, observe if it works quick, sharp
and strong, and increasing in bulk nearly double what it was before it
began to work, with a sweet sharp taste, and smell, with the appearance
of a honey comb, with pores, and always changing place, with a bright
lively colour, then you may pronounce your yeast good; on the contrary,
if it is dead, or flat and blue looking, with a sour taste, and smell,
(if any at all,) then you may pronounce it bad, and unfit for use, and
of course must be renewed.