374 FORCING GARDEN. 



lively bottom-lieat is kept up by means of repeated lin- 

 ings. When there is danger of scorching the roots, 

 the pots are partially drawn up, or even set upon the 

 surface of the tan. The following table will give an 

 idea of the temperature (Fahrenheit's thermometer) and 

 its progressive increase : — 



During Night. During Day. 



March G0° to 70° G0° to 80° 



April 70 — 75 70 — 85 



May 75 — 80 90 — 100 



June 80 — 85 100 — 120^ 



After the beginning of July, the heat is allowed to 

 decline by degrees, until it arrive at the winter tempe- 

 rature of 60°. It is to be understood, however, that 

 these temperatures regard only stable-dung or tan heat ; 

 and that, too, applied to crowns, as the- larger suckers 

 seldom require more than 100°. When foe-heat is 

 used, and it should always be through the medium of 

 hot water, the nocturnal temperature should only ap- 

 proach towards 80° ; and there should be some expedi- 

 ent for the sloiu immission of steam into the atmosphere 

 of the pit. During the whole summer, care is employed 

 to prevent the plants from being draivn, and for this 

 purpose they are allowed much space, and are placed 

 as near the glass as possible. In August and Septem- 

 ber a^bundance of air, and more copious supplies of 

 water, are given. In winter, the chief care is to pre= 

 serve the roots from damping off, and for this reason, 



* These temperatures were actually maintained in the pineries 

 of the Royal Gardens at Kensington in 1825. Our authority 

 (Mr. Gowans, now gardener at Gadder House, and a most sue-- 

 cessful horticulturist) has subsequently 'recommended a miti- 

 gated scale. 



