"If I could only wash it in a solution of sulphuric acid," pursued my uncle, "I should be able to clear it from all the earthy particles and the shells which are incrusted about it.
—Si pudiese lavarlo en una solución de ácido sulfúrico añadió el profesor—, haría desaparecer todas las partes terrosas y esas conchillas resplandecientes incrustadas en él.