FORCING -HILLS 69 



to concentrate the sun's rays, and to prevent the 

 bank from washing down with the rains. A clod 

 of earth or a stone may be placed upon the pane 

 to hold it down. This type of forcing -hill is not 

 much used, because the bank of earth is apt to 

 wash away, and heavy rain coming up when the 

 glass is off will fill the hill with water and drown 

 the plant. However, it can be used to very good 

 advantage in cases where the gardener can give it 

 close attention. 



A forcing -hill is sometimes made by digging a 

 hole in the ground and planting the seeds in the 



bottom of it, placing the pane of glass upon a 

 slight ridge or mound which is made upon the 

 surface of the ground. This method is less 

 desirable than the other, because the seeds are 

 placed in the poorest and coldest soil, and the 

 hole is very apt to fill with water in the early days 

 of spring. 



An excellent type of forcing -hill is made by the 



