AQUARIUM APPLIANCES 



123 



point is to rub off the sharp edges of the glass, as the fish, if alarmed, 

 may injure herself trying to get through the small separation. 



Fig. 103. Glass-Bar Breeding Cage 



The cage trap shown in above figure has several important advantages, 

 one of them being that it is a commercial product, and may be obtained, 

 at a very moderate price, from a number of dealers, delivery by mail being 

 quite safe. The sides and bottom are composed of glass tubes spaced 

 slightly apart and inserted in holes through a metal frame, the ends being 

 of plain glass secured against ends of tubes by bending terminals of frame. 

 The cage is Sy 2 inches long, 4 inches wide and 2> l / 2 inches deep. It may 

 either be suspended by the wire hooks from sticks across the aquarium 

 or hooked on the edge. Free water circulation takes place and the young 

 may escape through bottom or sides. 



At the present price it would not pay to make this device, but should 

 it later be unobtainable commercially (such things do happen) our read- 

 ers will have little trouble making it. Brass is the easiest metal to work, 

 and should be nickel plated when finished. The glass bars or tubes ought 

 to be of about 3/16 inch diameter and set apart the thickness of a half 

 dollar. The two connecting strips at the bottom (turned up at the ends), 

 continue the entire length, and are secured by soldering, the same as the 

 upper strips. 



A number of years prior to the invention of this cage our friend 

 L.M.D. developed the very good idea of a mat of glass bars, secured by 

 number 18 gauge fuse or aluminum wire, as shown in figure 104, the wire 

 thus spacing the bars perfectly apart. This is made to just fit the inside 



