65 



over-heating, which would probably occur ; and a 

 very little excess would do the roots an irreparable 

 mischief. As to setting the plants on the surface of 

 the bed for a time, as is recommended by some gar- 

 deners, the question is, whether such a remedy would 

 not be almost as bad as the expected evil sought thus 

 I to be avoided. 



Succession Plants in structures heated by dung, or 

 other fermenting materials, will do very well and grow 

 quite fast enough if the interior atmosphere is main- 

 tained from 50 to 60 degs. with air admitted, provided 

 the heat is applied upon a good principle from the 

 top of the outsides of the structure, to allow of air 

 * to be given to pass off any superfluity of vapour, the 

 escape of which is most essential at this season. Plants 

 grown in a strong humidity at this period of the year 

 would be likely to suifer from debihty, instead of ac- 

 quiring a healthy sturdiness and a moderate progres- 

 i sive growth, and dark green colour, which will always 

 I be maintained with a moderate heat properly applied, 

 I with sufficient air, to preserve the foliage of the plants 

 from a wet or damp appearance, which at this season 

 ! is dangerous to their well-doing. To prevent excessive 

 dampness the bottom materials should be in the most 

 I genial condition, and the linings be applied at top of 

 ' the sides of the structure instead of at the bottom. 

 This heating from above, to a considerable extent, 

 would act similarly to the sun shining in drying and 



F 



