Background: a cast iron Parrot Shell, Britten Shell, etc. Foreground: a Coal Torpedo such as this one, designed to look like an ordinary piece of coal, would explode when placed into a train or steamboat's firebox.
Background: a cast iron Parrot Shell, Britten Shell, etc. Foreground: a Coal Torpedo such as this one, designed to look like an ordinary piece of coal, would explode when placed into a train or steamboat's firebox.