Note 1259 — SALTPETRE. GUNPOWDER. AQUAFORTIS.
William Johnston translation
[The celebrated chemist Baron Berzelius, professor at Stockholm, states in his Manual of Chemistry (edit. 1835, vol. iv. p. 86), that every possessor of land in Sweden is still compelled to deliver a certain quantity of saltpetre yearly to the state, and gives directions for testing its goodness.]