Mounted Steel Mortar

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“The mortar is a stout cannon of forged steel with simple vent firing and rear trunnions. The maximum pressure with the heaviest bomb is 16 tons to the square inch.” —Encyclopeadia Britannica, 1922


Encyclopaedia Britannica (12th ed., vol. 32) (New York, NY: The Encyclopaedia Britannica Company, 1922)


TIFF (full resolution)

2400×1980, 609.2 KiB

Large GIF

1024×844, 114.5 KiB

Medium GIF

640×528, 60.8 KiB

Small GIF

320×264, 22.0 KiB