Boltheid or Bolthead: How To spell?
The word Boltheid is misspelled against Bolthead, a noun meaning "A long, straight-necked, glass vessel for chemical distillations; -- called also a matrass or receiver."
The word Boltheid is misspelled against Bolthead, a noun meaning "A long, straight-necked, glass vessel for chemical distillations; -- called also a matrass or receiver."