32 THE BOOK OF THE HONEY BEE 



This piece (E) is not nailed to the brood chamber, but 

 is simply a loose bridge which spans across CC of the 

 floor board, and serves to prevent bees crowding up into 

 the air space. A piece of perforated zinc may be used 

 in place of this, in which case it is better to nail the zinc 

 to the bottom edges of the brood chamber, making it 

 (the zinc) an inch longer than the wooden bridge for the 

 purpose. 



In nailing together the four sides AA and BB take 

 particular care that the inner surfaces of AA are exactly 

 14J inches apart. 



A line drawn i| inches from either end of BB should 

 (presuming BB to have been accurately cut) correctly 

 indicates the position of the two pieces AA. 



The same applies to the super. 



The metal runners DD must be so adjusted as to 

 bring the top bars of the frames exactly flush with the 

 top of the brood chamber. "When nailing these into 

 position use an empty frame fitted with the metal ends 

 as a guide. 



The same precaution applies to the super. 



