The lead-glazing on the china, the verdigris which formed about her copper and bronze vessels, etc., had long been a trouble to her. She got him to tell her about these, and, naturally, they often had to fall back on the first elements of medicine and chemistry.
Irakaspenak eskatu zituen guzti horretaz eta, jakina, fisika eta kimikaren oinarrizko kontzeptuetaraino jo behar izan zuen atzera.