86 



The Florists^ Review 



OCTOBBB 18, 1917. 



Greenhouse Heating. 



SpBSCRiBERS are invited to write the 

 Editor of this Department with regard to 

 any details of greenhouse heating that 

 are not understood. But please do not 

 ask The Review to make a choice of ap- 

 paratus for you. The greenhouse heating 

 equipment advertised in this paper is, we 

 believe, the best for the trade to buy, 

 and each article the best in the special 

 field of its adaptation. 



ILLINOIS COAL FREIGHT UP. 



Illinois iiiombers of the trade will 

 have to pay an additional char^je of 15 

 cents per ton for coal purchased during 

 the year beginning October 15. The 

 Illinois State Public Utilities Commis- 

 sion October 10 granted to the railroads 

 permission to increase the rate on coal 

 15 cents ])er ton. This, of course, applies 

 to intrastate transportation, the state 

 commission having power only to regu- 

 late rates within the state. The in- 

 creased rate is effective for one vear. 



PIPING VEGETABLE FRAMES. 



I am writing to you for information 

 about the heating of some frames. I 

 have been using the frames for, the 

 growing of vegetable plants in the 

 spring, but I also wish to use them for 

 winter lettuce. Will it be necessary to 

 run hot water pipes in the soil in order 

 to germinate the seed of the vegetable 

 plants, or will pipes run along the top of 

 the bed answer the same i)urj)ose? The 

 beds are (5x.'50 feet. At the low side 

 the soil is about fourteen inches from 

 the glass. M. A. & S.— Okla. 



So far as securing the required tem- 

 perature in the frames is concerned, a 

 2-inch hot water i)ipe would maintain 

 the temperature needed for lettuce, but 

 the crop will come on in one-half the 

 time if bottom heat is given. For a bed 

 thirty feet long, we would suggest run- 

 ning a 2-inch flow ))ipe at the back of 

 the frame near the top and two lVi>- 

 inch j)ij)es about two feet from each 

 edge. If ])ossible, we would have the 

 return ])ii)es slightly above the top of 

 the boiler. 



USE THREE OR FOUR FLOWS. 



Please give me some directions about 

 the heating of a greenhouse 2-1x125. A 

 hot water system will be used. How 

 many main flows will be needed to feed 

 eight 2-inch returns.' I suggested that 

 two 2iX.>-inch ilows would be enough. 

 Was I right? What temperature would 

 that amount of ]>i]iinji: niaintain in the 

 house, with the outside teinper;iture 5 

 decrees below zero? For a lettuce 

 house, would one 2''j-inch jiipe be 

 enough to feed fifteen I'^-inch returns.' 

 What size of l)i]>e should be connected 

 with the main to feed two 2 1 •■-inch 

 flows ? F. H. W.— O. 



To feed eight 2-inch return ])ipes in 

 a house 2-1x125, we would use three 

 2^/^-inch mains or flow jiijjes. If there 

 is no glass in the side walls, it will be 

 easy to niaintain a temperature of 50 

 degrees with that amount of piping, 

 using the mains as overhead flows. 



We would not use l^-iiuch returns in 

 houses more than seventy-five feet in 

 length. For a house fifty to seventy-five 

 feet long we would use two 2%-inch 

 flows, if fifteen P^-inch returns are 



P= 



DEPENDABLE 

 GREENHOUSE HEATING 



=^ 



NO 

 TUBES 



TO 

 CLEAN 



Kroesehell Water Tube Steam Boiler 



For steam plants less than 100 horse power. 

 The boiler of UDegualed fuel economy. 



NO 



BRICK 



WORK 



REQUIRED 



You can positively rely on KROESCHELL Boilers to produce an 

 even and steady supply of heat, insuring the most perfect growing 

 conditions at all times. 



Kroesehell Boilers 



have a larger proportion of direct fire surface than any other boiler, 



□ and are known as the quickest hot water heaters and the fastest LJ 



\3 steamers ever designed — easily installed — burn any kind of fuel. LJ 



3,016,286 square feet of glass was equipped with 

 KROESCHELL Boilers during the year of 1916. 



D_ 



KROESCHELL BROS. CO-Z'SHTc/ot^^r ^ 



