The red and white designs on the wall of the room, the entrance and exit, are of two colors. The opening and closing of the trap, the making of the bomb, and the killing of the rats, are, as I have said, mere decorations. The bomb, as a means of effecting the circulation of commodities, is a complicated mechanism. And so are the different forms of the means of production, the yarn, the cotton, the coal, and so on, which circulate the product of labour in these factories.