84 



Tile Weekly Florists' Review. 



NOVGMBBB 3, 1910. 



TAYLOR SPRINGS COAL 



THE COAL or MERIT 



Non-Ginkering^ Sootless and Free Burning 



CANTINE 



Washed or Unwashed 



Mine I— Taylor Springs, III. 

 ** 2— Cantine, IIL 



BLACK BRIER 

 Carterviile Coal 



Mine 3 — Cantine, III. 

 " 4— Johnston City, m. 



THB WIS! VLORIST WILL ORDSR NOW. Writ* or Wire today for Prices F. O. B. your city. 



Montgomery County Coal Co., Chicago 



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Greenhouse Heating. 



WATER UNDER PRESSURE. 



I have a hot water plant with an open 

 expansion tank. Having added a new 

 house this summer, the tank does not 

 seem to supply pressure enough. As it 

 would be rather difficult to raise it 

 higher, I thought to connect with the 

 city water mains. The question is, can 

 I run the city water direct to the boiler 

 unci do away with the tank, or must I 

 get a covered tank and run the water 

 in that? Also, would such an arrange- 

 ment have any effect on the water 

 meter, which is about 100 feet from the 



boiler? 



L. G. B. 



The question does not indicate just 

 why the plan of elevating the expansion 

 tank or of connecting with the city 

 mains, and thus securing circulation un- 

 der pressure, has been considered. The 

 adoption of either method, however, 

 will make it possible to increase the 

 temperature of the water in the pipes, 

 and this will both hasten the circula- 

 tion and increase the efficiency of the 

 plant. This, however, will only be pos- 

 sible, provided there is reserve capacity 

 in the heater, and by the expenditure 

 of considerably more fuel. 



Pressure can be secured either by use 

 of a closed tank or by connecting with 

 the water mains. The latter is the sim- 

 plest, but it has the objections of dan- 

 ger from drawing off the water in case 

 of a break in the water system, and of 

 a possible explosion if the connection is 

 closed. At any rate, a safety valve 

 should be used. 



CAPACITY OF BOII^R. 



We have an eighty horse-power, high- 

 pressure boiler, containing fifty-two 

 flues and returns, and desire to heat 

 the following houses: House No. 1, for 

 vegetables, is 86x109 feet, seven, feet 

 to the girtters, twelve feet to the ridge, 

 aJi#coHWlins 15,000 square feet of 

 glass. Both end^ are glass, the north 

 wall has three feet of glass and the 

 south wall is all glass. There are no 



HARRISBURG-rRANKUN COAL CO. 



1816 FISHER BLDG., CHICAGO 



Tbe Better Grades ONLT of 



INDIANA AND ILLINOIS COALS 



Preparation and Quality as tbey sliould be. Write to-day for Prices 



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