. Florists' review [microform]. Floriculture. 92 TheWcekly Florists' Review. April 4, 1912. rangements quite clearly except in one particular—the relative elevation of the boiler and the returns—and that is where the trouble most likely lies. The diagram shows a 2l^-inch main which runs with a slight upward pitch to the farther end of the house, where it branches and supplies two coils of- five l^^.-inch pipes running along the end and sides of the house back to the boiler. The boiler has a 20-inch grate and is evidently able to heat the house readily, and there is no reason appar- ent for the
. Florists' review [microform]. Floriculture. 92 TheWcekly Florists' Review. April 4, 1912. rangements quite clearly except in one particular—the relative elevation of the boiler and the returns—and that is where the trouble most likely lies. The diagram shows a 2l^-inch main which runs with a slight upward pitch to the farther end of the house, where it branches and supplies two coils of- five l^^.-inch pipes running along the end and sides of the house back to the boiler. The boiler has a 20-inch grate and is evidently able to heat the house readily, and there is no reason appar- ent for the trouble mentioned unless the returns are below the top of the heater. It would be better, however, if the flow were given a slight fall and the expansion tank were connected with the highest part of the flow, instead of with the return, as seems to be the case from the diagram. If the returns are much below the top of the heater, this would not do away entirely with the difficulty, although it would lessen it to some extent. Aside from raising the boiler end of the flow pipe so that it will have a slight fall, it will be necessary to lower the boiler so that it will be as low as, or lower than, the lower part of the returns. Instead of lowering the boiler, the same eflfect could be obtained by plac- ing a mercury generator on the expan- sion pipe. STEAM FOR THREE HOUSES. Kindly give me a few hints about the heating system that I am going to install. I have three connected houses, each 27x200. The boiler pit is eight feet deep and is at the center of the houses, on the north side. 1 shall use two No. 36, 8-section Ideal steam boil- ers. My heating engineer advises me to place the main supply pipe in the same way as the return, in a trench in the ground. Would this method give me perfect circulation in the sys- tem? I should not like to have a steam trap attached to it. What would you advise? I am located near Brooklyn, N. Y. C. T. While the data furnished are not sufficient
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