Tod, George / Plans, elevations and sections, of hot-houses, green-houses, an aquarium, conservatories, &c., recently built in different parts of England, for various noblemen and gentlemen : including a hot-house and green-house in Her Late Majesty's gardens at Frogmore
Preface, pp. -8
7 in the wall itself: this mode, it is obvious to every one, is of bad conse- quence, as a great quantity of the heated air will be absorbed by the mass of brickwork to which the flue is attached. In short, every flue ought to stand unconnected with any external wall of such buildings as those under discussion, except where it enters from the fire. No cavity ought to be left between the flue and the wall where it immediately enters the building; or if ayavity is left, the heat occasioned by the fire ought to be confined in the cavity, and be conveyed some distance into the house, before it is suffered to escape: were it allowed to escape from the flue by cavities immediately on its entering the house, that part would be overheated, and a regular diffusion of the rarefied air would not take place. Pargeting the interior of flues is also a bad practice; grouting with lime and sand is preferable. Another improvement the author adopts is, to putty the laps of the glass on the roof; this prevents the admission of external air; and the laps ought not to be more than three-eights of an inch: in severe frosts great expense is incurred by the glass breaking, if glazed in the common way; caused chiefly by the expansion of the frozen water, which occupies the space between the laps; filling up these spaces with putty, is therefore preferable, or at least of equal utility with leaded laps; much less expensive, and more durable. The light and elegant appearance given by the aifthor to his buildings, so far as regards the carpenter and joiner's work, and more especially to the roofs, he would particularly recommend. The quantity of timber used in the roofs of many buildings of this sort, adds much to the expense, while it prevents the admission of a considerable quantity of light, and loads unnecessarily the external walls. An inspection of any of his buildings will best show the pleasant and elegant manner in which they are constructed. King's Road, Sloane Square, London.
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