Seek your sa' where you got your ail, and beg your barm where you buy your ale.
Yeast, or barm, or leaven was used both in baking and in brewing.
He took her body on his arm, Her slumbering head lay on his barm.
And then you may work it with barm if you please; but it is most commended without.
When it is cold, set it together with some barm, as you do Beer.
Barm, brm, ...