"These plates of brass"

1. 1 Ne. 5: 18-19
     18 That these plates of brass should go forth unto all nations, kindreds, tongues, and people who were of his seed.
     19 Wherefore, he said that these plates of brass should never perish; neither should they be dimmed any more by time. And he prophesied many things concerning his seed.
2. Alma 37: 3
     3 And these plates of brass, which contain these engravings, which have the records of the holy scriptures upon them, which have the genealogy of our forefathers, even from the beginning—