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The Rorists^ Review 



June 19. 1919. 



Greenhouse Heating 



Subscribers are invited to write the 

 Editor of this Department with regard to 

 any details of greenhouse heating that 

 are not understood. When information 

 is desired regarding the capacity of boil- 

 ers, or the amount of radiation required 

 for a greenhouse, the needed temperatures 

 should be stated in the inquiry, as well 

 as the amount of glass in the side walls, 

 and the dimensions and general arrange- 

 ment of the greenhouses. It is often help- 

 ful, also, to have a sketch showing the 

 location of the houses. 



CAPACITY OF BOILERS. 



Will you kindly state how much glass 

 can be heated to a temperature of 55 

 degrees, in zero weather, by two con- 

 nected cast-iron boilers, each with a 

 grate 30x35 inches? The greenhouses 

 are on a hillside and are all connected. 

 The boilers are at the foot of the in- 

 cline, on lower ground than any of the 

 houses. S. T. F.— Conn. 



In determining the amount of glass 

 that can be heated by a boiler with a 

 grate of a certain size, allowance must 

 be made for the amount and nature of 

 the heating surface in the boiler, the 

 size and height of the chimney, the con- 

 struction and exposure of the house and 

 the arrangement of the radiating sur- 

 face. The kind of coal used and the 

 skill and attention of the fireman will 

 also have much to do with the efficiency 

 of a boiler. 



Under, the best of conditions and 

 using anthracite, we would expect to 

 be able to heat 4,000 square feet of 

 radiation and this should supply 14,000 

 square feet of glass in zero weather and 

 maintain a temperature of 55 degrees. 

 This, however, is considerably more 

 than should be expected of the boilers, 

 as it is seldom that the conditions are 

 ideal. With everything well balanced 

 and with a house fairly easy to heat, 

 we would not hesitate to figure on 3,000 

 square feet of radiation, or 10,500 

 square feet of glass. If a fairly good 

 grade of soft coal is used, the boilers 

 should handle at least 8,000 square feet 

 of glass and might, under the best of 

 conditions, take care of 10,500 square 

 feet. 



IN THE GOOD OLD SUMMER. 



It is human to incline to the Arkansas 

 doctrine, "When it rains you can't fix 

 the roof; when it shines you don't 

 need it." 



In the summer we don't need coal; so 

 we rarely worry about the winter to 

 come. Government by habit is so strong 

 with most of us that the sins of the 

 winter are almost always forgotten in 

 summer. Pretty gardens, the green grass 

 and the genial sun arouse forgiveness; 

 we skip and gambol on the green, glad 

 of the escape from frigid blasts; next 

 winter is something else; we should 

 worry! 



But we always do worry. Eare have 

 been the winters in which boreal blasts 

 have not found us shivering in the jaws 

 of coal famine. Every winter we hear 

 the same reports of inadequate produc- 

 tion, of insufficient transportation, of 

 storms fhat halt traffic, of two days' 

 supply of fuel left in the bunkers be- 

 tween us and extinction from business. 



■ DBDBoaaBaHDBOBDBaaaBnHOH ob 



: THE KROESCHELL : 



HOT WATER BOILER i 



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Here is the boiler that is making the most wonderful greenhouse 

 heating record in ttie world. Florists and gardeners who have 

 used otiier makes are constantly giving the KROESCHELL Green- 

 house Boiler the highest praise. 



3,974 606 square feet of glass was equipped with KROESCHELL 

 Boilers during 1916 1917. You will find the KROESCHELL in 

 every State in the Union and Canada. The supremacy of KROE- 

 SCHELL Boilers is proved by their country-wide adoption. 



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Every boiler made at our works is of the highest standard. Ma- 

 terial—governed by Kroeschell specifications— the best that money 

 and brains can produce. Workmanship— the kind that is an in- 

 spiration to all boiler makers. Boiler efficiency— determined by 

 actual tests under working conditions. Boiler ratings— honest 

 and true blue— guaranteed actual working capacities. 



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The superiority of our boilers has resulted in the removal and 

 abolishment of hundreds of sectional cast-iron boilers. In every 

 instance KROESCHELL BOILERS give more heat with the same 

 piping and with less fuel. 



WHEN YOU BUY -GET A KROESCHELL 



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- KROESCHELL BROS. CO., 



444 W. Erie Street ■ 

 CHICAGO, ILL. 



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