Prepare and season meat in usual way. Place in large dry vessel; put very hot radiator in bottom of cooker well; place vessel containing roast on radiator, and place another very hot radiator on top. Close cooker and fasten. Allow it to remain about one-half hour per pound of meat.
The roast may be browned in a very hot oven before putting into cooker or just before serving.
The New Royal Cook Book (1920).