570 



THE PRACTICAL GARDENER. 



[Jan. 



will suppose the plants to be growing in beds of tan, leaves, 

 dung, or a mixture of all, and when reference is made to the 

 temperature, it is to be understood as applying to the scale ol 

 Fahrenheit's thermometer, as being in the most general use 

 in gardens. 



In addition to this, however, may be added that of Six's, 

 and denominated Six's registering thermometer. It will be 

 found useful as a check on the person, who has the charge oi 

 the fires, it being so constructed, as to indicate the extreme 

 points to which the heat has follen or risen in the course ot 

 the day or night ; and for ascertaining the temperature at the 

 roots, or in any part of the bed, we recommend the pine-bed 

 thermometer, invented and manufactured by Mr. Bregazzi, 

 price II. I2s. 6(1. , which may be procured by means of any 

 of the respectable London nurserymen. 



NURSING PINE PLANTS. 



The temperature of this department should now be kept up, 

 as near as can be to G5°, mornings and evenings, and in sun- 

 shine, on good days, it may be permitted to rise to 70°. In 

 whatever way this department be heated, whether by fire-heat, 

 steam, dung, or tan and leaves in a state of fermentation, the 

 same degree of temperature should be kept up, which can be 

 readily done by any of those materials. The general manage- 

 ment of the plants will be the same, in whatever way the 

 temi>erature is kept up. Air should be freely admitted every 

 good day, dividing the quantity so admitted regularly, that a 

 equal circulation may be in all parts of the pit or frame 

 Whatever the state of the weather may be, it is necessary thr 

 the confined air be allowed to escape, which can be done b 

 tilting up the ends of some of the sashes an inch or more a 

 front, and a corresponding number being also opened at th 

 back ; the confined air being lighter, by reason of its being muc 

 warmer, will either rush out or be displaced by the pressure of th 

 cold, and of course the heavier air, forcing in on the opposite sid 

 will in a few minutes charge the pit with a volume of fresli ai- 



