360 



INDEX. 



principles. Error committed in laying hot-house roofs too flat. Table show- 

 ing the number of rays reflected at different angles. Circumstances on which 

 the slope of roofs depends, 34 



SECTION III. 

 STRUCTURES ADAPTED TO PARTICULAR PURPOSES. 



Forcing-houses, culinary-houses, &c. Purposes of their erection. Section 

 of a forcing-pit figured and described. Large forcing-pit figured and described. 

 Dimensions of winter forcing-houses. Skill required in the forcing of fruit 

 in winter. Polyprosopic forcing-houses figured and described. Advantages 

 of pplyprosopic roofs, 39 



Pits. The Cambridge pit. Saunders' forcing-pit figured and described. 

 Curvilinear roofed cold pits. Dung beds. Temporary frames. Plant pro- 

 tectors. Figures and descriptions of them, 43 



Framing ground. Its purposes. General condition of this department. 

 Appropriate site for it. Ground plan and disposition of framing ground, . 49 



Orangeries, graperies, &c. Latitude given in their construction. Repre- 

 sentation of a range of cold-houses at Clifton Park. Size of cold-houses. 

 Figures of lean-to and span-roofed houses. Figures of double and single- 

 roofed curvilinear houses, 54 



Objections raised against curvilinear houses in England. Properties pos- 

 sessed by curvilinear houses. Reflection and refraction of light by them. 

 Their adaptability for grape-growing. Gable ends. Objections to them, . 58 



Polyprosopic houses. Figures and descriptions of do. Double-roofed 

 houses of this kind. Cold vineries. Disadvantages attending them. 

 Front wall of hot-houses. The height of do. Objections to upright fronts. 



Parapet walls, 60 



_ Ridge and furrow-roofed houses. Figure and description of a house of this 

 kind. Directions for building ridges and furrows. Glazing of do. Advan- 

 tages of do. Principle of their construction, 64 



Cold vineries. Range of small booses figured and described. Advantages 

 of small houses over large ones, 67 



Green-houses, conservatories, &c. Distinction between green-houses and 

 conservatories. Amalgamation of the two together. Appropriation of green- 

 houses in summer. Span-roofed green-houses preferable to single-roofed ones. 

 Beauty of well-grown plants. Impossibility of growing plants well in opaque 

 houses. Proportions of a green-house, " 73 



Plan of green-house, and description. Prospective view of green-house. 

 Range of green-houses. Height of plant-houses. Errors in making them too 

 high. Conservatory at Regent's Park Botanic Garden. Principles of design 

 and taste displayed. Advantages of low-roofed plant-houses, 76 



SECTION IV. 



INTERIOR ARRANGEMENTS. 



Arrangements for forcing-houses, culinary-houses, &c. Trellises and meth- 

 ods of fixing trellises. Roof trellises. Centre trellises. Cross trellises. 

 Trellises for double houses, 84 



Interior of green-houses. Slope of sfreen-house stages. Green-houses for 

 promiscuous plants. Width and height of green-house shelves. Stages for 

 small plants, &c., 87 



Conservatories, Orangeries, &e. Houses for growing large plants. Con- 

 servatory beds. Level of do. Objections to the general form of conserva- 

 tory beds. Irregular method of laying out the interior of conservatories. 

 This method illustrated in the conservatory at the Royal Botanic Garden, Re- 

 gent's Park. Ground plan of a conservatory laid out in the irregular style. 

 Advantages resulting from this method, 89 



