The Book of Household Management by Mrs. Beeton

790. THE BEST AND MOST HUMANE MODE OF KILLING ALL LARGE HOGS is to

strike them down like a bullock, with the pointed end of a poleaxe, on the forehead, which has the effect of killing the animal at once; all the butcher has then to do, is to open the aorta and great arteries, and laying the animal's neck over a trough, let out the blood as quickly as possible. The carcase is then to be scalded, either on a board or by immersion in a tub of very hot water, and all the hair and dirt rapidly scraped off, till the skin is made perfectly white, when it is hung up, opened, and dressed, as it is called, in the usual way. It is then allowed to cool, a sheet being thrown around the carcase, to prevent the air from discolouring the newly-cleaned skin. When meant for bacon, the hair is singed instead of being scalded off.