14" Discrepanci/ of Tei-restrial and Atmosplieric Temperature, 



of it is to be seen but what is well furnished with wood. Here 

 are a plant-house and grapery ; and, adjoining the latter, there is 

 what is called the ball-room, but which is at present used for 

 wintering the orange trees, for which it is very well adapted. 

 This little place is the picture of neatness during the summer, 

 and is particularly gay with flowers, especially along a line of 

 border, which separates the peach wall from the view of the 

 house. 



(7*0 he continued.^ 



Art. II. On the Discrepancy of Ter^-estrial and Atmospheric Tem- 

 perature, ivith regard to the Cultivation of Exotics, more particularly 

 the Vine; and on the proper Application of Water, so as to render 

 it a henejicial Agent in elevating the Temperature of the Soil. 

 By N. 



Most of the objects of British horticulture being natives of 

 warmer climates than that to which they are transferred, it 

 becomes an important study to afford them, by artificial means, 

 a climate as nearly as possible approaching to that of their 

 respective habitats. Hence many are placed so as to receive 

 additional warmth, from the accumulation of solar heat, against 

 walls, or some other intercepting medium; and this accumula- 

 tion will be found to be in proportion to the privation of heat, 

 which the medium, whatever it may be, occasions to the space 

 or objects on the opposite side. We can, to a certain extent, 

 divert the elements from one object to another ; but, although 

 we can do this to a great extent, we cannot unlimitedly : and 

 better it is that such is the case, otherwise the surface of the 

 earth, from the monopolisation of light, for instance, in some 

 places, would have been rendered a chequer of light and dark- 

 ness. 



If, instead of a wall of opaque materials, a plane of perfectly 

 translucent glass could be raised, no privation of heat would 

 be the consequence as regards the north side; and, according to 

 what is above stated, no accumulation towards the south would 

 take place. The transparency of this plane, so beneficial under 

 other circumstances, would, in this case, be totally unavailing in 

 the acceleration of vegetation. Glass, highly transparent, when 

 properly situated, has the property of transmitting nearly the 

 whole of the solar rays to the interior of a house ; and their 

 lieat, by diffusion, raises the interior atmosphere of the dwell- 

 ing. This diffusion is, however, not unlimited ; for the intensity 

 of communicated heat must bear a relation to the proportion of 

 the volume of air to that of the surface of glass ; and will tend 

 to diminish inversely as the former is increased in proportion 

 to the latter. Most gardeners will agree that very wide houses 



