16 
HINTS ON CAGE-BIRDS. 
One oe Dr. Creswell’s Aviaries. 
As regards draw -trays for cages. I prefer zinc to anything else ; 
wooden trays get wet, swell up, and become jammed; tin gets rusty, 
but zinc is easily cleaned and is some years before it gets corroded 
through. 
Lastly, touching the character of cage or aviaiy, the most 
economical of space for the former is the square or oblong form, 
but the aviary should have a span or sloping roof. The most satis- 
factory form of aviary is that with a warmed indoor section for 
winter work, and an unheated outdoor section for summer work. 
As to the method of heating, the best plan is undoubtedly by hot- 
water pipes and a coke stove; oil stoves are never wholly satisfactory,' 
but hot air, if accessible, should answer well. 
