. Florists' review [microform]. Floriculture. 82 The Florists' Review AUGDST 1, 1912. is to be used, run one 4-inch pipe to the greenhouse and take off a 2%-inch flow to run along the plate. Then, by means of an eighth bend, extend the flow pipe to a point under the ridge and then, make a square turn to the east. Take off a 2^-inch flow to be carried down to the plate on the south side and extend the main under the ridge to the east end of the house, after reduc- ing to 2%-inch. Just before reaching the partition, take off a 2-inch flow from each of the flows on the plates, to be dropped down
. Florists' review [microform]. Floriculture. 82 The Florists' Review AUGDST 1, 1912. is to be used, run one 4-inch pipe to the greenhouse and take off a 2%-inch flow to run along the plate. Then, by means of an eighth bend, extend the flow pipe to a point under the ridge and then, make a square turn to the east. Take off a 2^-inch flow to be carried down to the plate on the south side and extend the main under the ridge to the east end of the house, after reduc- ing to 2%-inch. Just before reaching the partition, take off a 2-inch flow from each of the flows on the plates, to be dropped down to feed a coil of six 2-inch pipes, which will be required to supplement the radiation coming from the other house in order to raise the temperature to 70 degrees. There will then be three 2^-inch flow pipes passing through the house to the extreme east end. In addition to these pipes, it will require eighteen 2-inch pipes to maintain a temperature of 60 degrees in zero weather. Six of these should fee fed from each main. Those connected with the flow pipe on the plates should be on the walls under- neath and the others can be under the two middle benches. When the parti- tion is reached, the returns in the mid- dle of the house should be united into one 2%-inch return. This should be carried back to the point where the -4)ipe8 enter the house, either through the west room or under the walk and along the north wall, as will be most convenient, and there connected with the main return. The other returns should also be united at the west end of the greenhouse and connected with the main return. A NORTH DAKOTA OREENHOXJSE. I am building a greenhouse, 20x115, four feet high to the eaves and twelve feet to the ridge. How many pipes and what size should I usef State the size of the supply and returns for steam. I wish a temperature of 50 degrees at night. The outside temperature in this part of North Dakota occasionally drops to 40 degrees below zero. I can get a small steel boiler,
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