Heating by the circulation of hot water through pipes was also originated or revived during the 18th century, and a short time before Watt’s circulation of steam. It is said that Bonnemain of England, in 1777, desiring to improve the ancient methods of hatching poultry by artificial heat--practised by both ancient and modern Egyptians ages before it became a latter day wonder, and taught the Egyptians by the ostriches--conceived the idea of constructing quite a large incubator building with shelves for the eggs, coops for holding the chickens, and a tube for circulating hot water leading from a boiler below and above each shelf, and through the coops, and back to the boiler. This incubator contains the germs of modern water heaters. In both the steam and water heating systems the band or collection of pipes in each room may be covered with ornamental radiating plates, or otherwise treated or arranged to render them sightly and effective. In one form of the hot-water system, however, the collection of a mass of pipes in the rooms is dispensed with, and the pipes are massed in an air chamber over or adjacent to the furnace, where they are employed to heat a current of air introduced from the outside, and which heated pure air is conveyed through the house by flues and registers as in the hot-air furnace system. The hanging of the crane, the turning of the spit, the roasting in ashes and on hot stones, the heating of and the baking in the big “Dutch” ovens, and some other forms of cooking by our forefathers had their pleasures and advantages, and still are appreciated under certain circumstances, and for certain purposes, but are chiefly honoured in memory alone and reverenced by disuse; while the modern cooking stove with its roasting and hot water chambers, its numerous seats over the fire for pots, pans, and kettles, its easy means of controlling and directing the heat, its rotating grate, and, when desired, its rotating fire chamber, for turning the hot fire on top to the bottom, and the cold choked fire to the top, its cleanliness and thorough heat, its economy in the use of fuel, is adopted everywhere, and all the glowing names with which its makers and users christen it fail to exaggerate its qualities when rightly made and used.