MANUAL OP THE APIARY. 



29 



thread, and thus resemble a hollow cylinder formed by closely 

 winding a fine wire spirally about a pipe-stem, so as to cover 

 it, and then withdrawing the latter, leaving the wire un- 

 moved. Nothing is more surprising and interesting, than 

 this labyrinth of beautiful tubes, as seen in dissecting a bee 

 under the microscope. I have frequently detected myself 

 taking long pauses, in making dissections of the honey-bee, as 

 my attention would be fixed in admiration of this beautiful 

 breathing apparatus. In the bee these tubes expand into large 



Fig. 2. 



Bespiratory Apparatus of Bee, magnified. — After Duncan. 



lung-like sacks (Fig. 2,f), one each side of the body. Doubtless 

 some of my readers have associated the quick movements and 

 surprising activity of birds and most mammals with their 



