26 



THE FLORAL WORLD AND GARDEN GUIDE. 



CANNELL'S SYSTEM OF HEATING PLANT-HOUSES. 



R. CANNELL has, during the last few years, introduced 



a system of heating plant structures in his nursery at 



Woolwich, which is certainly quite new, and appears to 



be well deserviug of the instant attention of those who 



are interested in the heating of plant-houses and pits. 



Instead of fixing large pipes upon, or just above the floor of the 



house or pit, small pipes an inch or so in diameter are fixed just 



under the roof, as shown in the accompanying illustration. By this 



arrangement, Mr. Cannell considers that he is able to provide the 



GEEAHIUM HOUSE HEATED BY CANNELL 3 SYSTEM. 



inmates of the houses with warmth in the most congenial form pos- 

 sible, and he also believes the plants thrive better in houses so 

 heated, than when the pipes are fixed in the usual way. He has 

 now adopted this system in nearly all the plant-houses and pits in 

 his nursery, and the healthy condition of the plants prove in a most 

 unmistakeable manner that it may be adopted elsewhere, without 

 any risk of the plants suffering. This system of heating cannot, of 

 course, be adopted in ornamental structures, because of the necessity 

 for keeping the pipes out of sight, but for houses in which plants 

 are prepared for conservatory decoration and the flower-garden, no 

 difficulty will be experienced. 



