The Flint and Stone implements sometimes found in this and other countries seem to form a sort of connecting link between geological and human antiquity; they are certainly the work of man, and they may possibly be older than the invention of metallurgy, and nearly coeval with the human race: it becomes therefore a matter of some interest to determine whether and to what extent the use of stone implements may have been contemporary with that of metals; and the references below given will, it is hoped, assist in elucidating this question.