. An encyclopædia of gardening; . omes first in order. Where uprightBashes are used, there are generally brick walls, either carried up solid from the found-ation, or built on piers, according as it may be desirable to have the roots of the plantswithin pass through to the soil without, or not. In the case of fixed roofs, that part ofthe wall which is above ground is formed with horizontal openings, to which opaque orglazed shutters are fixed, opening outwards for the purpose of admitting air. A recentimprovement on parapets consists in forming them of cast-iron props or pillars (fg 267.),whic
. An encyclopædia of gardening; . omes first in order. Where uprightBashes are used, there are generally brick walls, either carried up solid from the found-ation, or built on piers, according as it may be desirable to have the roots of the plantswithin pass through to the soil without, or not. In the case of fixed roofs, that part ofthe wall which is above ground is formed with horizontal openings, to which opaque orglazed shutters are fixed, opening outwards for the purpose of admitting air. A recentimprovement on parapets consists in forming them of cast-iron props or pillars (fg 267.),which are placed on a basis of two or three bricks (c, c), three or four feet under the sur-face : to these props, top and bottom rails are fitted, which are rebated to receive a shut-ter, (fg. 268.) The wall-plate (a, b,fgs. 267, & 268.), which receives the ends (d) ofthe rafters or sash-bars, forms also a gutter for carrying off the water of the roof, exter-nally (a), and the condensed water internally {fgs. 267, & 268. b).. 1642. Where tlie roof is moveable on the polyprasopic plan, no such shutters are re-quired, and therefore the ends of the rafters may go at once three or four feet into thesoil, according to the nature of tlie foundations, and rest on brick-work ; the surface ofthe ground, and the lower edge of the lowest sash being united by a* moveable plate,forming at once a gutter and a rest for the lower rail of the sash. Book III. HOT-HOUSE FURNACES AND FLUES. 323 1643. Holes for vine-steins (Jig. , f). In all parapets or front arrangementswhere vines are to be introduced from without, particular care must be had to provide forthe withdrawing of the vines, even when their wood is of a con-siderable age and thick-ness. For this reason, where horizontal shutters are used, the lower styles or piecesagainst which they shut, should always be moveable ; and, in general, it may be stated,that of the various for the introduction of the vine from without which have
Size: 2227px × 1122px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade18, booksubjectgardening, bookyear1826
