HOT -HOUSE DISPLAY ED. 565 



As to die bark.- bed heat, this generally con- 

 tinues a conftant, moderate and regular heat 

 two or three months without any trouble, 

 affording both a fine moill growing warmth to 

 the roots of the pines, and other plants 

 plunged therein, as well as impart a mol?: 

 agreeable niild^heat day and night to aflift in 

 warming tiie air of the houfe, both in con- 

 junclion with that of the fires in Winter, and 

 wjthout, fo as in mild line day's, no iires will 

 be nece/liii*y even in the Winter feafon ; and 

 in Summer, the bark-bed heat is fufficient 

 night and day without any fire at all, from 

 May to Odlober. 



However, as the bark-bed will gradually 

 decline in heat after two or three months, 

 when ihe pots being taken out, and the tan 

 being- forked over to the bottom, it will re- 

 new its heat in a proper degree for two or 

 three months, or more, longer; then, when 

 the heat is found much decreafed, is renewed 

 by forking over again, as above ; or previ- 

 oully, about January and April, add a third 

 or fourth part of new tan, firit removing as 

 much of the old at top, forking up the re- 

 maining old and new together, which will 

 revive the heat till July or Auguft, and fork- 

 ing it over once more, and if thought need- 

 ful, a portion -of frefh tan, as above, will 

 continue the bed in proper order till OOober, 

 when the old bark fhould be r^oved, and 

 the pit filled again with a portion of frefn 

 tan frum the tanneries. 



3 C During 



