HOT-BEDS. 317 



that afforded by the sash, the internal heat being suf- 

 ficient to overcome any external cold. 



If we start our hot-beds in winter, we shall need pro- 

 tection. The best is a thick straw mat; and, if very 

 cold, this may be covered by a board shutter. One mat 

 should be sufficiently large to cover two sashes. 



These mats, if properly cared for, will last many 

 years. 



We have not treated of the use of a hot-bed for 

 striking cuttings ; it is, however, most serviceable for 

 this purpose ; and with a small hot bed, a good supply 

 of verbenas, salvias, heliotropes, and such plants, may be 

 obtained. 



27 



