24G 



THE GARDENER. 



[June 



bind Mr Cowan to the adoption of any form of boiler or any particular 

 shape of kiln, the principle of the patent being the combination of 

 the apparatus for heating horticultural or other buildings and making 

 lime at one and the same time. Part of the kiln itself, or the whole 

 of it, may be made of iron, and so turned into a large boiler when 



^ 



Fig. 12. 



circumstances would warrant such an arrangement and any one can 

 easily conceive what an immense heating power could thus be put 

 in force. The working of this combination is said to be very 

 simple, the chief point being the proper quantities of either 

 limestone or chalk, and fuel with which to charge the kiln. 

 The kiln is filled quite full before it is lighted. When once 



