For thousands of years galvanism slumbered in copper and zinc, and they lay quietly beside silver, which must be consumed in flame as soon as all three are brought together under the required conditions.
Ehunka urtetan egoten da lozorroan galvanismoa kobrean eta zinkean, eta lasai egoten dira zilarraren ondoan, zeinek hirurek beharrezko baldintzetan bata bestea ukitzen dutenean, sugarretan hasi behar izaten baitute.