270 SCHOOL AND HOME GARDENS 
LETTUCE 
Head lettuce. Head-lettuce plants may be produced 
by sowing seeds in boxes indoors or under glass. Sow 
one fourth of an inch deep. After watering, cover the 
box with a windowpane and set it in a warm place near 
Fic. 148, A Field of Head Lettuce 
the stove or radiator for twenty-four hours; then move it 
to a sunny window near the glass. The seedlings should 
be up in three or four days. Turn the box daily to keep 
them straight. Transplant to another box when the 
second leaf appears, and set them deeper than in the 
seed box and about two inches apart each way. 
