Masonry oven more common as accessory features of a masonry heater. A compromise design known as the gueulard in France combines aspects of both internal and external-fired models. Masonry ovens remain popular in part because of the way their use affects cooking processes and food flavor. Where modern gas or electric ovens cook food by moving hot air around inside an insulated, lightweight box, a masonry oven works by soaking up heat, like a battery building up a full charge. When hot, the heavy oven walls release the heat slowly, for hours. Thus the food is cooked not only by hot air,
All Gas and Gaiters BBC in this era. Two of the colour episodes from series 5 are preserved as black and white 16mm film recordings only (three earlier episodes were always black and white). Only six colour episodes are preserved in their original colour videotape format. "Christmas Night with the Stars" was a programme screened annually on Christmas night, when the top stars of the BBC appeared in short versions of their programmes, typically five to ten minutes long. "All Gas and Gaiters" appeared once alongside its sitcom spin-off "Oh, Brother!" in 1968. This telerecording no longer exists in the BBC's film and videotape