The question was:
I have a question.If one heats old brood comb to try  recover the wax,it
becomes the foulest mess,   looks like the cells are lined with something,
the round dome ends survive the temperature of boiling water. They are black
and smelly. Is it propolis or is it feces? Any one know.??
 
  Old brood comb is mostly left-over cocoons from developing honeybee pupae.
As each larva changes into a pupa, it spins a cocoon in the cell where it is
living.  An adult honeybee hatches from the cocoon.
 
Beeswax is most easily recovered from cappings.
 
Tim Sterrett
Westtown, (Southeastern) Pennsylvania, USA
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