Probably she filtered the wheat out of something else, then rebaked it on a laboratory burner.

However, existing laboratory burner lamps left much to be desired not just in terms of the heat of the flame, but also regarding economy and simplicity.

She quickly assembled a pile of leaves around the spindly trunk, and she produced the small laboratory burner she had kept on her person.

With his laboratory assistant, Peter Desaga, he developed the Bunsen burner, an improvement on the laboratory burners then in use.

In 1855, Desaga perfected an earlier design of the laboratory burner by Michael Faraday into the Bunsen burner.

A Meker-Fisher burner or Meker burner is a laboratory burner that produces multiple open gas flames, used for heating, sterilization, and combustion.