The Weekly Florists' Review* 



251 



Water Lilies and Margin Planting at the Pan-American Exposition. 



For the heating of the houses 29 x 185 

 feet to sixty degrees, he will need sixteen 

 lines of one-inch pipe or thirteen lines of 

 line and one-quarter inch pipes, or their 

 equivalent, conveniently distributed be- 

 low the benches, and for heating the 

 shorter house to seventy degrees, twenty- 

 five lines of one-inch or twenty lines of 

 one and one-quarter inch pipes or their 

 equivalent. 



The sizes and arrangement of the 

 mains would be determined by the loca- 

 tion of boiler cellar and grades of housc'^, 

 depth of boiler below floor of greenhouse 

 and other at present unknown conditions, 

 as would also the definite arrangement 

 of the heating coils. 



He.\ry W. Gibhoxs. 



New York. 



PIPING FOR STEAM. 



We are starting a range of five houses 

 18x100 feet, side walls 4 feet, 10 feet to 

 ridge pole, permanent sash bars, and 

 houses all connected, running north and 

 south. How many IJ-inch pipe should 

 we have to maintain a temperature of 

 55 degrees? Will one 2-inch overhead 

 steam pipe be enough for feeding all coils 

 in a house of that width, etc., main 

 steam pipe to run about 75 feet from 

 boiler to first house? 



Will the boiler be low enough if the 

 ground in houses is on a level with top 

 of boiler, not counting steam dome? The 

 boiler is a tubular boiler with steam 

 dome and is 28-horse power. Will that 

 size heat that number of houses to ad- 

 vantage using soft coal and having a 

 night man? What do you consider the 

 best way of piping? Can the pipes be 

 arranged with one valve for every two 

 pipes or would it be better to use valves 

 on all except one pipe on each side of the 

 house? L. S. 



In answer to L. S. for the 

 five houses IS x 100 feet, con 

 gether on riiliic :iii.l fiiiiuw 



of 



continue 4-inch to second with 2-inch 

 outlet, then SJ-inch to third house with 

 2-inch outlet, 3-inch with 2-inch outlet 

 to fourth house and continue 2-inch to 

 fifth house. The return mains starting 

 at fifth house would be li-inch increasing 

 to 2-inch at fourth, 2i-ineh at third, 3- 

 inch at second and continuing 3-inch past 

 first to boiler. 



If the top of the boiler is level with 

 the ground line of greenhouses, it will 

 answer, but go a foot deeper if you can. 

 It is best to valve both ends of all piping 

 except one circuit, so as to give perfect 

 control. 



Each house will require 8 lines of 1^- 

 inch pipes if a complete circuit is to be 

 made, that is having each coil start 

 fiom boiler end of house out to far end 

 and back, but if a 2-inch overhead steam 

 main is run from boiler end down hill 

 to far end and returning through coils, 

 only 7 lines of IJ-inch pipe will be 

 needed; we sometimes use only six in 

 such cases, but it is better to bo on the 

 safe side and use seven. 



Heney W. Gibbons. 



New York. 



SMALL PIPES FOR HOT WATER. 



Is it advisable to use IJ-inch pipe for 

 hot water heating? If not, kindly give 

 reason, and the proper size to put in. 



Montana. C. F. D. 



On 



dred and fifty feet in length under the 

 pressure system, which is really a circu- 

 lation of steam and water in combina- 

 tion. 



In circulating through pipes of small 

 diameter friction becomes excessive, and 

 in Older to overcome or counterbalance 

 llh' t\,rrk iiwi)\ til I'iiTuhil ion by such 

 tiiilhin, i,i..ir ,.|i.M'j\' iiiii-l l.r I'reated at 

 l.nil.L .■illin- h\ liMviii^; u^iirr leave boil- 

 r) ji ;i luuliri liiuperaturc, or by boiler 

 1iI:i((m1 jt ;i L'lraler depth below the cir- 

 riiliiiiirj r,,il, ,(1 as to give a greater dis- 

 tiiiirr nl ilni'it Vertical fall to return 

 main at the boiler. 



For water circulation in ordinary com- 



ercial greenhouse practice I prefer pijic 

 iviiig an inside diameter of two inches. 



Henry W. Gibboxs. 

 New York. 



PIPING FOR HOT WATER. 



herewith submit .several proposi- 



tions with accompanying diagrams 

 desire to know which would be the most 

 effective for hot water. In diagram No. 

 1 would the closed pipe (c) be better 

 than the cylinder (a) ? If cylinder were 

 used, what would be the difference be- 

 tween a closed cylinder (a) and an open 

 cylinder (b) ? 



Diagram No. 2. Should the flow pijie 

 rise from e to h, or fall from f to h? 

 Should the coil (d) be horizontal or per- 

 pendicular? 



Is one large flow pipe more effective 

 than several small ones? A. W. T. 



In response to the inquiry of A. W. T., 

 referring to his diagrams Nos. 1 and 2. 

 and answering the questions in their reg- 

 ular order, I would say, I would give a 

 preference to arrangement indicated in 

 general by figure No. 1, with end con- 

 nection C as being the most simple to 

 construct, and avoiding all unnecessary 

 friction, but with the addition of a sup- 

 ply and expansion tank at G, and air 

 vents or cocks in upper elbows of pipes 

 C. if connection A is used, the connec- 

 tions from the coil to cylinder or stand 

 pipe A should have a diameter as large 

 as the main connection from boiler to 

 coil, and the standpipe should be not less 

 than said connection in diameter, and, if 

 A is open at top, it should have a diam- 

 eter of about twice that of said connec- 

 tion, so as to prevent blowing out of 



water when tiring hard. The height of A 

 or its extension as indicated by B need 

 be sufficient to accommodate the expand- 

 ed water in the apparatus at its highest 

 temperature, and such that the volume 

 of this heated water, when its tempera- 

 ture becomes normal, or say fifty degrees, 

 maintains a level in A above the coil. If 

 cylinder B were left open, no air valves 

 nor other feed or expansion tank would 

 be roquii-ed, but if closed, it should be 

 prn\ ided with an air cock at top end, and 



