chamber, 19 inches; diameter of chamber, 9 inches. The weight of the mortar was 14,700 pounds; that of the bed, 16,000 pounds; of the empty shell, 916 pounds; and the bursting-charge, 99 pounds.
The chamber would contain about 30 pounds of powder, but 12 pounds were found to project the shell to a distance of 800 or 900 yards.
This monster affair burst with a charge of less than 20 pounds of powder after a few rounds firing.
Among the largest mortars on record are those of the island of Malta. The rocks here are not only scarped into fortifications, but likewise into fireengines or artillery to defend those fortifications; being hollowed out in many places into the form of immense mortars.
These mortars they fill with cantars of cannon-balls, shells, stones, and other deadly materials; and if an enemy's ship should approach with a design to land, they fire the whole into the air. The effect of this tremendous invention must be very great, as it will produce a shower for 200