THE 
GARDEN YARD 306 
when snow and ice lie on the sash, there is some light 
getting to the plants, and in clear weather the heat from 
the sun’s rays during the day is stored up in the bed and 
held by the double glass with the air-space between. 
That is why even in zero weather the half-hardy plants 
need no extra covering. 
It is quite possible that the gardeners of this country 
may make a system of their own for intensive cultiva- 
tion, to equal and perhaps excel the French system with 
its repeated covering and uncovering of the frames. The 
sash are made in Louisville, Ky. 
