PART I. CONSTRUCTION OF 

 HOT-HOUSES. 



SECTION I. 



SITUATION. 



1. Site and position. — Before proceeding to details regard- 

 ing the structures themselves, it will be necessary to consider, 

 briefly, the situation on which the structures are to stand. A 

 glazed structure depends for its effect very much upon its posi- 

 tion; and as the position 'most desirable for effect may very 

 possibly militate against the utility and efficiency of the struc- 

 ture, the question presents a double claim to our consideration. 

 In illustrating the position most desirable for the erection of 

 houses for horticultural purposes, I assume that the paramount 

 object is utility. I will subsequently point out reasons which 

 frequently occur to render the position of green-houses and con- 

 servatories beyond the control of the erector. 



By site and position I must not be understood to imply merely 

 the aspect upon which a house for horticultural purposes should 

 stand. The aspect of a house may be affected by circumstances 

 which have no relation to its site. In other words, the glazed 

 elevations of a house may be turned in any direction, while the 

 position may be altogether unsuitable whichever aspect may be 

 given to it. The weather, at all seasons of the year, has unde- 

 niably more influence on a house in some situations than it has 

 upon houses in others more favorably placed ; and this influence 

 is sensibly felt bv the products v/hich are o-rown within them. 



