Food and drink prohibitions In Argentina and other Spanish language countries bull's testicles are served as "huevos de toro" or 'bull's eggs'. In some regions, such as the European Union, brains and other organs which can transmit bovine spongiform encephalopathy ("mad cow disease") and similar diseases have now been banned from the food chain as specified risk materials. Although eating the stomach of a goat, cow, sheep, or buffalo might be taboo, ancient cheesemaking techniques utilize stomachs (which contain rennet) for turning milk into cheese, a potentially taboo process. Newer techniques for making cheese include a chemical process with artificial rennet. This means that
Carrying wheel Carrying wheel A carrying wheel on a steam locomotive is a wheel that is not driven; i.e., it is uncoupled and can run freely, unlike a coupled or driving wheel. It is also described as a running wheel and their axle may be called a carrying axle. A carrying wheel is referred to as leading wheel if it is at the front, or a trailing wheel if it is at the rear of the locomotive. In particular reference to steam engines, the carrying wheels have a very important purpose of allowing the engine's weight distribution to be altered. For example