DADANT SYSTEM OF BEEKEEPING 



67 



are unable to sufficiently ventilate the inside of the brood-cham- 

 ber and supers. We must remember that every corner, every 

 story of a hive is in absolute need of a current of fresh air which 

 is supplied at great pains by establishing a line of fanning bees, 

 incessantly forcing pure air in and foul air out. Yet in many 

 colonies there may be but a shallow entrance, partly closed by 



Fig. 39. Supers set back for ventilation in hot weather 



