38 How TO Grow Cit Flowers. 



boiler than the water works give, the result will be 

 empty your boiler and pipes into the hydrant. Wh 

 a valve is essential on the pipe connecting the hydra 

 with the boiler, it must always be left open when the boi 

 is in use. Do not commit the error of a brother flor 

 who was also searching for " purchased wit," and 1 

 cause the fire was moving the Avater towards and ii 

 the hydrant, shut the valve! — the result of his expc 

 ment being, that the next time he looked at his boi 

 the pressure was above danger point, and had not vc 

 been given at once and the fire raked out, boiler, houi 

 and all would have traveled skywards. 



To insure a free circulation, connect a stand pi 

 with the flow at its highest point near the boil 

 This should be of the same size as the pipe with whi 

 it is connected, and from three to five feet long. CL 

 the top securely, tap and screw into its highest poi 

 an automatic air cock, in order that all air may be ( 

 pelled as fast as it gathers. 



Marvelous figures were given, a few years since, 

 the saving in pipe by this method over the other t^ 

 but experience does not substantiate them. I he 

 found seven two-inch pipes none too many to maints 

 a temperature of 65 degrees in a house twelve feet wi 

 and for one eighteen feet wide, sixteen are used. T' 

 is more than twice the amount of pipe needed wh 

 the circulating medium is t<team. 



