35 



Answer. — A conservatoi y is not a very good place for 

 :in aviary, as it is so difficult to keep the temperature of 

 it fairly equable. 



There is no better method of heating an aviary than 

 l)y liot-water pipes, and there are some comparatively 

 inexpensive systems in which gas is used for heating 

 the water. Any good hot- water engineer could give you 

 particulars of these. The gas should be outside the 

 aviar}-. 



If you do not want to go the expense of hot-water 

 pipes, you might have a gas stove in which the products 

 of combustion are carried off by a flue. J?ut with these 

 there is always the risk of a down draught, which would 

 drive the fumes into the aviary, or, worse still, extinguish 

 the flame and cause an escape of gas. (vSince the intro- 

 duction of water-gas, the gas supplied from most works 

 is much more poisonous than it used to be). In Clarke's 

 Syphon Gas Stove there is no flue, but the products of 

 combustion are condensed in the stove. It is a very 

 safe, useful, and economical stove, but I think there 

 must be a greater vitiation of the atmosphere from its 

 use than with a properly acting pipe stove. 



One of Rippingille's (Oil) Hotwater Stoves for Green- 

 houses might do very well, if it could be so arranged 

 that the fumes from the lamp should not pass into the 

 aviar}-. Ordinar\' oil stoves are very bad, as they simply 

 heat the air by burning it. Moreover, all oil-stoves are 

 dangerous, being apt to go wrong— and when that 

 happens the thick smoke is most destructive to birds, 

 and is quite sufficient to kill half the occupants of an 

 aviar}' in one night. 



If you do not mind the cost, I should strongly advise 

 you to go in for hot-w^ater heating. Probabh' a coke 

 furnace would cost less in the end than gas as a means of 

 heating the water, but it would require winch more 

 attention. 



I recenth' heard of an aviar}' being heated by a ver}- 

 simple arrangement, which was said to act extremely 

 well. An ordinarv fish-tail gas burner, outside the 



