HEATING BY HOT WATER. 209 
the crown of the furnace, over the fire, properly connected 
to the usual circuit. This also I have accomplished in 
more than one instance with good results. 
Hot Water Fittings.—Connections and fittings for 
joining and fixing the ordinary straight lengths of piping, 
Fig. 145. 
in almost every imaginable manner, are made by iron- 
founders, and may be obtained of any hot-water engineer or 
good ironmonger. Those chiefly required are the common 
elbow (Fig. 144), with either one or two sockets—long 
radius elbows, for use on outer rows where two rows are 
Fic. 146. 
fixed side by side are occasionally, though very seldom, 
required—the syphon (Fig. 145), of which 4 is a plain 
syphon, B a three-way syphon, and c a four-way 
syphon. Plain open syphons are sometimes required. 
P 
