o o 
172 THE AMATEUR’S KITCHEN GARDEN, 
preferred by most practical men, because light exercises a great 
influence upon the flavour of the produce, When grown with- 
out the required degree of light, the fruit is bitter — so much 
so sometimes, in flat-roofed houses during dull weather, as to 
be positively uneatable. 
As will be seen in the sections here given, rubble is repre- 
sented to be the means of conducting the heat from the hot- 
water pipes below to the soil above in which the plants are to 
be placed ; but we do not recommend rubble in perference to 
