MARCH.] THE HOT-HOUS.E. 301 



Propagating by Cuttings, Layers, &c. 



Propagate, by cuttings and slips, various shrubby green-house 

 plants, as myrtles, geraniums, fuschia's, oleanders, hydrangea's, 

 jasmines, coronilla's, justicia's, &c. the young shoots planted in 

 pots, and placed in a hot-bed, will soon strike root and grow free- 

 ly ; or where there is the convenience of bark -beds, either in a hot- 

 house, or under any glass frames, Sec. these, and many other sorts, 

 if plunged therein, may be struck very expeditiously ; or, if at the 

 same time some are covered with a hand-glass, it will still more 

 expedite their rooting ; giving proper waterings. 



Likewise propagate shrubby kinds by layers, and also different 

 sorts by suckers, &c. 



THE HOT-HOUSE. 



Fruiting Pines, 



It is OIY a due proportion of air admitted into the Hot-house, 

 that the goodness of the pine plants, in a great measure depends. 

 The want of it will cause them to grow with long leaves and weak 

 stems, which plants, never produce good fruit. . 



On the other hand, air admitted in too great a quantity, or at im- 

 proper times, will injure the plants, and cause them to grow yel- 

 low and sickly. 



In the depth of winter, during the time that the plants are nearly 

 in a state of inaction, the hot-house will require but very little air ; 

 yet it will absolutely be necessary to take every favourable oppor- 

 tunity to let out the foul air, and admit fresh, when it can be done 

 with safety to the plants ; the letting down the glasses a little way, 

 even fora, few minutes, in the middle of the day, is of more impor- 

 tance than inexperienced persons .can conceive, especially when 

 there is a little sun and a mild wind. But at this season, particu- 

 larly in the advanced part of the month, to have regard to the words 

 give air on the botanical thermometers, is not necessary, for a lit- 

 tle may with much safety be given, although the spirits should not 

 rise higher than 62 of Fahrenheit, or six or eight degrees above 

 temperate. 



It will be necessary to continue a regular degree cf heat in the 

 house, as directed last month, by keeping up a fire-heat every even- 

 ing, night, and morning, but more particularly in severe weather ; 



