294 CULINARY GARDENING* BOOK I. 



current of external air. As this can only be done with propri- 

 ety when the external air is nearly of the same temperature as 

 that of the house, it is evident that vegetables grown in hot- 

 houses must be great part of the year without this invigorating 

 motion. I have attempted by several methods to produce a 

 motion of the air of the house alone, by means of ventilators 

 of different kinds, and which might produce wind, or a breeze, 

 to exotics at all seasons of the year. I have hitherto, however, 

 been unsuccessful, except in some particular houses where a 

 good deal of room could be obtained; and then wind may be 

 produced by putting in motion several large boards, which 

 may be fastened on one side, by hinges, either to the back- 

 wall, front glass, or roof. 



After these general remarks on culinary hot-houses, a few 

 observations shall be added on the particular kinds. These 

 arrange themselves into three classes: 1. Those for peaches, 

 nectarines, cherries, figs, &c. 2. Those for vines. 3. Those 

 for pines. 



1. Those for peaches and similar trees, where the climate is 

 cold, are with propriety placed against walls, and formed of 

 glass on one side: but where it is moderate, as in most parts of 

 England, a house formed of glass on all sides, and with the 

 trees planted and allowed to grow irregularly as standards, will 



