 Other objects worthy of your notice, Jefferson says, the soil, the growth and vegetable production, the animals of the country, especially those not known to us, the remains and accounts of any which may be deemed rare or extinct, the mineral productions of every kind, metals, limestone, pit coal, saltpeter, salines, mineral waters, saltpeter is really important in making gunpowder, noting the temperature of the last and such circumstances may indicate their character, volcanic appearances, climate,