CONSTRUCTION OF IIOTBEDS 
107 
157. Sash. — The most durable wood should be used in 
making hotbed and cold frame sash. Cedar or cypress is 
usually employed. Many of the old sash now in use were 
made of white pine. However, it is a mistake to have 
sash made of the softer woods at local factories which 
do not make a specialty of this line of work. Sash differ 
FIG. 19. SASH FOR HOTBED OR COLD FRAME 
greatly in width and length, but the" standard and most 
popular size is 3 x 6 feet. Longer sash require wide 
frames which are inconvenient in the daily care of the 
plants. Sash vary also in thickness ; 2-inch lumber when 
dressed makes a very strong sash, but it is more common 
to use 1 ^2-inch lumber, which planes down to i^s- The 
