INDEX. 381 



SECTION V. 



MATERIALS OF CONSTRUCTION. 



Workmanship. — Bad foundations, &c. — Temporary nature of horticultural 

 erections. — Conseouence of bad constructed houses. — Superior workmanship. 



— Economy of building substantial houses, _ 99 



Materials of construction. — Most suitable materials for building hot-houses. 



— Metallic houses — Superior to wood. — Opposition to iron hot-houses. — 

 Objections raised. — Ot)jections answered. — Expansibility of copper — Of 

 iron. — Power of metals to conduct heat. — Electricity an objection. — Cost 

 of iron hot-houses. — I\Ir. Ressor's iron vinery. — Horticultural structures in 

 Europe of iron. — Transportability of materials, &c., 101 



SECTION VI. 

 GLASS. 



The physical properties of transparent bodies. — Glass of the palm-house ai 

 Kew. — Report of Mr. Hunt, from Silliman^s Journal of Science. — Calorific 

 influence of the glass chosen. — Action of the non-luminous rays of light. — 

 Green glass of Melloni, 106 



Evils consequent on employing bad glass in hot-houses. — Knotted and 

 wavy glass. — Its effects. — Resources against bad glass. — Painting and shad- 

 ing the glass. — Inconveniencies attending both these methods. — Utility of 

 using good glass. — Propriety of manufacturers of glass making good mate- 

 rial, 109 



Glazing. — Size of laps. — Glazing roof-sashes. — Objectionable nature of 

 broad laps. — The most approved method of making laps. — Curvilinear glaz- 

 ing. — Reversed curvilinear glazing. — Puttying the laps. — Glazing ridge and 

 furrow roofs. — Anomalous surfaces, 110 



Color of walls. — Considerations in favor of a dark color. — Influence of 

 reflected light on dark walls. — Retention of heat by dark-colored walls. -- 

 Color of the rafters. — Painting of the wood-work of the house with an anti- 

 corrosive solution, 113 



SECTION VII. 

 FORMATION OF GARDENS. 



Form of the garden and disposition of the ground. — Considerations neces- 

 sary for fixing on the site. — Walks. — Entrance-walk. — Formation of walks. 



— t)ifl"erent kinds of walks. — The durability and comfort of walks. — Materials 

 for the surface of walks. — Form of the surface. — Edges of walks, . . . .116 



Borders and compartments. — Width and size of do. — General ri.le for lay- 

 ing down borders. — Size and number of compartments. — Bad efl'ects of small 

 walks, 119 



Walls — their msc. — Forms of walls. — Their height. —Gardens of Mr. 

 Cushine, at Watertown. — Hot and flued walls. — Wooden fences. — Com- 

 parative ♦•conomy (A walls and fences, 121 



