150 



MESSRS. WHITTY'S (LATE EDMONTON'S) BAIT CAN. 



oxigenated ; and hence, when the many pairs of gill-leaves (fish- 

 lungs) had separated from the water in the can all the oxigen it 

 originally contained, they first ' turned up,' as the expression is, 

 and then died. Various dodges have been invented to meet 

 this. I used to employ a sort of hand-bellows, consisting of an 

 india-rubber ' squash-ball,' fitted to a piece of tubing, with which 

 I could, with considerable trouble and always supposing that I 

 did not forget it from time to time convey some bubbles of 

 fresh life to the baits. But by Mr. Basil Field's aerating can all 

 these more or less rudimentary contrivances were superseded, 

 and an idea, valuable both from a utilitarian and from a 

 humanitarian point of view, received its complete and legitimate 

 development. By pressure upon the little knob shown in the 

 handle of figure 2, which can be readily applied whilst 



