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NOYXUBEB 2, 1906. 



ThcWcekly Rorists' Review. 



J 325 



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Front view of return connection 



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Front view of flow connection. 



Details of G)niiections of Branch Flows and Returns with Bench Q>ils in the Largfe Greenhouse of the John Young Co^ 



•2-inch return carries the water of con- 

 densation from this division back to 

 the return main. This is the only pipe 

 in the house that does not pitch toward 

 the east, i. e., follow the grade. As 

 the first cross walk is about fifteen 

 inches higher than the east end of the 

 house, it was necessary for this return 

 to dive into the grade. 



From this point the main is composed 

 of 6-inch pipe, and continues this size 

 through the second and third divisions, 

 being bled by 4%-inch branches at the 

 cross walks; each of these 4%-inch 

 branches or cross walk mains feeds 

 twenty-two lines of 1^-inch radiating 

 pipes. From the third cross walk to 

 the west end of the house, the steam 

 main is 4%-inch pipe. This feeds the 

 last of fourth division, which is heated 

 by twenty-three lines of 1^4 -inch pipe. 

 As noted, the two end divisions, Nos. 

 1 and 4, are heated by twenty-three 

 lines of 1^-inch pipe and the two in- 

 side divisions, Nos. 2 and 3, are heated 

 by twenty-two lines. This difference is 

 made up by larger steam and return 

 mains running through the two middle 

 divisions, and the house is, as a whole, 

 uniformly heated. 



The main steam pipe, which is well 

 carried on roller chairs, runs up the 

 north side of the house in the walk, 

 about ten inches to center above the 

 walk level. Its expansion is taken 

 care of by a 6-inch expansion joint 

 situated about eight feet to the west 

 of the third cross walk. The main is 

 well covered with asbestos covering, 

 having a waterproof jacket to protect 

 it when the plants are being hosed. It 

 is also securely anchored to prevent 

 its rolling downhill. It is relieved of 

 water through each of the cross walk 

 mains, which are in turn relieved by 

 a drip in the end connected with the 

 main return pipe which runs down the 

 south side of the house in the walk 

 at a depth under the walk level of 

 about its own diameter. 



The side coils are hung on improved 

 Lord & Burnham rafter iron clutch 

 hangers. Each end of these side coils 

 is securely anchored and every line is 



furnished with a brass expansion joint. 

 Under each bench in the house there 

 are two 1^-inch steam pipes, con- 

 nected, like the side coils, with the steam 

 cross walk mains at the west end and 

 to the return cross walk main at the 

 east end. These bench lines are all 

 anchored securely in the middle, and 

 the expansion is taken care of by the 

 swivel joints of the connections at the 

 ends of the lines. The total amount 

 of radiation in the house is about 7,062 

 square feet, or over three miles of 1^4- 

 inch pipe in lineal feet. The valve 

 control of the house is excellent, it be- 

 ing possible to run any one, all, or 

 none at all of the fifty lines of 1%- 

 inch pipe which comprise the radia- 

 tion. 



The - greenhouse with all its appur- 

 tenances and steam heating plant was 

 designed, constructed and installed by 

 the Burnham-Hitchings-Pierson Co. 



connecting the returns with the city pres- 

 sure is a good one where the pressure 

 does not exceed thirty to forty pounds. 

 If the pipes are properly graded there 

 should be very little heating up of the 

 pipe connecting the water with the 

 boiler. If you decide to get a new. 

 boiler it should have a capacity to heat 

 2,000 feet of radiation. Your houses 

 should have about 1,700 feet and a boiler 

 to heat this should have a rated capacity 

 for at least 2,000 feet of radiation. 



L. C. C. 



A COIL HEATER. 



I have three houses, one 20x80 and eight 

 feet to the ridge, one 20x75 and twelve 

 feet to the ridge, and one 20x100 eight 

 feet high. The ends are glass but the 

 walls are partly protected. The climate 

 is that of the.. District of Columbia. I 

 have a coil boiler which I have used two 

 winters but it does not work quite right. 

 It contains seventy li4-iiich pipes eight 

 feet long, with 3-inch manifolds. There 

 are five layers of pipes over the fire 

 space and two layers in the draft space. 

 Some of the tubes look badly burned and 

 in two places water drips where the scales 

 have been knocked off. Would you risk 

 this heater another year? I have the city 

 water connected with the return and the 

 hot water backs up into it some ways. 

 Would it be better to have an expansion 

 tank on the flow pipe! F. J. K. 



I doubt if it would be safe to go into 

 winter depending upon a boiler in the 

 condition you mention. It may be, how- 

 ever, that only few of the tubes in the 

 boiler are injured, in which case they 

 might be cut out and others put in with 

 long screw connections. The plan of 



HARRISn. 



Please tell us when Harrisii lilies 

 should be planted for next Easter. 

 What kind of soil should be nsed, size 

 of pot for 5x7 bulbs, and how should 

 they be treated? A, J. B. 



Lilium Harrisii should be potted just 

 as soon as the bulbs are received, for if 

 they are exposed to the air for a pro- 

 tracted period they deteriorate quickly 

 and seem to lose in vitality. For 5x7 

 bulbs for a first pot use 4-inch and pot 

 firmly, placing the bulb deep enough in 

 the pot so that it is just covered. They 

 do well in an ordinary rose soil which' 

 has been composted during the summer. 

 This compost should consist of five parts 

 good, fibrous loam and one part de- 

 composed cow manure, thoroughly incor- 

 porated. 



Immediately after potting they should! 

 be well watered and placed in a pit,, 

 plunging the pots in some such materia? 

 as ashes or sand, and covered beyond the 

 reach of frost. 



To get them into bloom for Easter 

 without having to resort to hard forc- 

 ing they should be brought into the 

 house at least sixteen weeks before that 

 date and placed in a house with a tem- 

 perature of 50 degrees, but it is usel^s 

 to try to force them if they have not been 

 potted sufficiently long to have made 

 good roots. 



As soon as the stems attain a length 

 of four inches they should be put into 

 the flowering pots and potted deep 

 enough to cover at least one inch of the 

 stem. These flowering pots should be 



Cross Section of Large Greenhouse of the John Young Co., Showing Benches and Branch Steam Mains. 



