HEATING BY HOT WATER. 199 
‘“‘ Horse-shoe,”” the ‘‘ Finsbury,” the ‘ Halifax,” etc., of 
which the two last are, to my mind, among the best of 
their class. 
A few other types of hot-water boilers, including the old 
‘‘Filliptic,” the ‘‘ Delta” (a modification of the ‘‘ Reliance ” 
boiler), etc., still remain unnoticed, but these are so 
seldom required or employed that it is hardly necessary 
to refer to them. Those already described are amply 
sufficient for any and every purpose. 
I heated my first greenhouse—a small lean-to affair only 
about 14ft. by 6ft.—with a couple of 9ft. lengths of 4in. 
cast piping (bought cheaply at second-hand), the furnace 
being placed in an adjoining cellar. The boiler consisted 
of one of those large cast-iron kettle affairs that one still 
sees occasionally in country houses where open grates 
are employed for cooking, and which are, or were, known 
by the name of ‘‘fountains.”” I screwed the lid of this 
down tightly, with some red lead, etc., drilling a hole in 
the centre and screwing in a 3in. elbow for a connection 
with the flow, while the long spout, with the tap unscrewed, 
formed the return connection. I set it as well as I could, 
placing a chimney formed of a length of 5in. cast pipe, 
just outside, and the whole worked admirably, and though 
the total cost was less than £1, it heated the little house 
capitally for several years. 
It is, indeed, quite surprising what can be done in this 
way with a few odds and ends of piping, a little contrivance, 
and Portland cement. I do not, of course, mean to convey 
that such makeshift apparatus are better than, or even 
quite equal to, a properly constructed affair, but these 
last are apt to run expensive, and beyond the means of 
