When contemplating the purchase of a heater, several years ago, I called upon a party who was running a newly-purchased heater. He seemed very much pleased with it, and said it ran admirably,--warmed his buildings nicely, and only cost about one dollar per day for coal. I made up my mind then and there that I should run my brooders a while longer. But on interrogating another party using one of a different pattern, he assured me that his heaters warmed both brooders and buildings in good shape at a cost of fifteen cents per day. This was presenting the matter in a new phase. The difference in cost of running these heaters one year would purchase two. I am now running three heaters called the "Bramhall-Deane Heater" and am heating two brooding houses (one 250 feet long, the other 175 feet long), at half the cost per day. Either steam or water may be used. I prefer water for both safety and economy. For instance, should the fire go out accidentally the heat would cease at once where steam was used, while water would hold its heat for hours, and would continue to circulate just so long as the water in the boiler was hotter than that in the pipes. I do not know but there are other heaters in the market just as economical as the "Bramhall-Deane," but I know of several prominent poultry men who are changing their heating principle, not because they are dissatisfied with the work done by that now in use, but solely on account of the expense attending it. Figure 12 represents our brooding-house as it appears outside. Its dimensions have already been given. It is boarded in with closely-fitting hemlock boards, the whole being covered on the outside with the heaviest quality of "Paroid" Roofing. [Illustration: BROODING HOUSE. (FIG. 12.)] This roofing is manufactured by F. W. Bird & Son, East Walpole, Mass. We have more than an acre under roofing, a large proportion of which is covered with Paroid. We find it strong, pliable, insusceptible to either heat or cold and to all appearances will be more durable than anything we have ever used. I have many buildings covered with this roofing. In applying it, begin at the eaves, lapping it 1-1/2 inches. It is so heavy that it does not require wooden strips to hold it down, simply nails and tin caps, which should be about an inch apart. A coat of the liquid, which goes with it, will glaze it over in good shape. For a flat roof, it is far better than shingles at less than half the cost. Interior Arrangement of Brooding-House.