SASH-BED CONSTRUCTION 



31 



type it will be found to be economy to equip 

 ii with an inexpensive hot water system. 



MATS AND SHUTTERS 



Hotbeds and coldframes, when used in 



climates or seasons in which the temperature 



is likely to fall much below freezing, must be 



provided with supplementary coverings. 



Fig. 17. Rye straw mats rolled for storage 



This is especially true wfien single-light sash 

 are used. 



Rye Straw Mats, are extensively used for 

 this purpose. They were formerly made by 

 hand but are now made by machinery and 

 are fairly reasonable in price. Each mat is 1 



