198 GREENHOUSE CONSTRUCTION AND HEATING. 
Having lately had some experience with two of these boilers 
I can recommend them, and the smaller sizes in particular, 
as fulfilling what is claimed for them admirably. 
The ‘‘ Loughborough ” boilers (Fig. 187), which are of a 
horse-shoe shape, and are constructed to be built into the end 
or front wall of a small greenhouse, were much in vogue 
at one time, and a good many thousands are in use. They 
Fie. 137, 
certainly possess some undoubted advantages, one of which 
is that a considerable proportion of the heat radiated by 
the boiler itself is not wasted outside, but is utilized inside 
the house, while they also have a very neat appearance, 
and for small structures are undoubtedly an improvement 
on the older forms. Their success of course induced a 
host of imitations, among which may be mentionted he 
