402 



PASTURAGE AND OVERSTOCKING. 



device (Pig. 155). A smootli glass surface moistened with 

 thia honey is covered with a screen placed in a slanting posi- 

 tion and graduated. The bees which reach the farthest on 

 the glass may be selected for breeding, provided they are 

 equally proficient in other respects. 



_sS- 



::^U',^-,^:^.^Jil '" ■ 



Pig. 157. 



BED CLOVER. 



(From Vilmorin-Andrieux, Paris.) 



Another desirable attainment is red clover with a shorter 

 corolla. This will probably be secured only by hybridiza- 

 tion. 



702. The linden, or bass-wood {Tilia Americana^ flg. 158) 



