. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 184 THE CIVIL ENGINEER AND ARCHITECT'S JOURNAL. ; carried the pillar out through the ceiling and roof of the room. The fire-grate and flue thus enclosed, had a chimney-piece of slate set to correspond. The slate, not being so good a conductor of heat as iron, does not give out any thing like the same quantity of heat an iron pillar or pipe would have done; at the same time tlie lieated air, Eassing U|) through the slate pillar imparts to it such a degree of eat, as a
. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 184 THE CIVIL ENGINEER AND ARCHITECT'S JOURNAL. ; carried the pillar out through the ceiling and roof of the room. The fire-grate and flue thus enclosed, had a chimney-piece of slate set to correspond. The slate, not being so good a conductor of heat as iron, does not give out any thing like the same quantity of heat an iron pillar or pipe would have done; at the same time tlie lieated air, Eassing U|) through the slate pillar imparts to it such a degree of eat, as adds very perceptibly, and I may add very pleasantly, to the warmth of the room. The Welch slate, as is well known, will crack* on being exposed to a very slight degree of heat, but my slabs were made ol Valencia slate (from quarries in Ireland), which do stand heat very well, if cautiously applied in the first instance. The superficial quantity of slate used was very small, the slabs being veiy narrow, consequently the expense was very trifling. The economy of heat I consider to be no small advantage in ray plan. In the case of a common brick chimney let into the wall, the heated air passes up it, imparting no heat to the room, but in the case of this slate pillar, erected mithin the room, the heated air passing up through it, is conducted by means of the slate into the room. Indeed it was found that the warmth of the room was fully maintained with a very small consumption of fuel. Should you deem this little plan worthy of being brought to the notice of your architectural friends through the medium of your valuable Journal, it will much oblige. Sir, Your obedient humble servant, London, May 6. A Lover of the Fireside. ALARUM WHISTLE FOR STEAM BOILERS. Sir—The enclosed sketch represents, in section, a simplified form of alarum whistle for steam boilers which has occurred to me. Should you deem it worthy of insertion, you will perhaps give it a place in your valuable a
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Keywords: ., boo, bookcentury1800, booksubjectarchitecture, booksubjectscience
