IS2 A MANUAL OF BEE-KEEPING. 



put on with tinned tacks, about 7-16 in length. Put the 

 boards as closely together at the end where the hinge is 



Fig. 66. 



as the two strips will allow them to come, and tack one 

 end of the long piece of leather. The boards should be 

 separated at the other ends as far as the width of the 

 leather will allow. Draw the latter close up to the wood, 

 and tack at intervals. Now tack the J-inch strip on for 

 a binding. When the tacks are all in (they should be 

 a little more than J inch apart), pare off the surplus 

 leather with a very sharp knife. Finish off everything 

 neatly with sandpaper, and the bellows is done, which 

 thus made should not cost more than one shilling, and 

 be as good as anything in the market, for this price. 



As air flows more rapidly through an orifice that is 

 made smooth with the corners rounded off, the hole in 

 the upper board should be rounded off on the inside 



