Then he lit the pilot light and set the coffeepot over a burner again.
Alex replaced the pot on the burner and resumed his place at the table.
Hold a small portion of the substance moistened with hydrochloric acid on a clean platinum wire in the fusion zone' of the Bunsen burner, and note any colour imparted to the flame.
These difficulties were mostly caused by the solid impurities contained in the burner-gases in the shape of flue-dust, especially the arsenic, which after a short time rendered the contact substance inactive, in a manner not as yet entirely understood.
She placed the skillet on the stove and turned the burner on to dry it thoroughly.