70 



ATMOSP. TEMP. 

 DAY. NIGHT. 



Fruiters.. 70 — 63=133 degs. 



Or mean about .... 66 

 To which add . . 10 



Gives for bottom heat 76 



Successions 60 — 56=116 degs. 



Or mean 58 



To which add .... 10 



Gives for bottom heat 68 



We cannot but think that this mode of computation 

 will exceed all dry rules, especially for the amateur, 

 or those who have all to learn on the subject of pine- 

 culture ; and by taking the intensity of light as the 

 basis of all the operations, little harm can ensue, and 

 the whole matter will possess more interest. 



IMr. Hamilton is very averse to what is called a 

 lively bottom heat ; and, indeed, so are most of our 

 best gardeners. Mr. Hamilton seldom allows the 

 bottom heat to rise to more than 84 degs., which is 

 about his maximum even in the height of summer : 

 he depends more on the continuous action of a great 

 volume of undisturbed fibres, together with a great 

 amount of unmutilated foliage, for he seldom removes 

 a leaf for the sake of top-dressing, unless quite de- 

 cayed. 



[March — Still further increase the temperature and 



