CONTENTS IX 



PARAGRAPHS 



Cost of construction, equipment and maintenance : 

 size to build, cost of construction, contract vs. home 

 construction, cost of equipment. (Pages 85-88) . . 67-70 



Estimated cost of constructing, equipping and main- 

 taining a modern range. (Pages 89-91) ... 71 



Income, from the range. (Pages 91-92.) 



CHAPTER VI 



HEATING THE RANGE. (Pages 93-115.) 



Difficulties in heating greenhouses uniformly, methods 

 of heating, comparative merits of hot water and steam 

 heating, controlling the heat, boilers, fuel, arrangement 

 of supply pipes, location of other pipes, determination of 

 radiation surface, table for finding the number of square 

 feet of radiating surface necessary to heat greenhouses 

 to different temperatures by hot water, comparison of 

 amount of radiating surface required for heating by 

 steam and by hot water. (Pages 93-107) . . . 72-82 



Systems of heating. 



Hot-water heating : open tank gravity system, closed 

 tank or pressure system with safety-valve control, with 

 mercury seal, forced circulation of hot water. (Pages 

 107-113) 83-85 



Steam heating : low pressure steam with gravity re- 

 turn, low pressure steam with steam return trap, high 

 pressure steam at boilers, with reduced pressure in 

 greenhouses, and pumped returns. (Pages 113-115) . 86-88 



CHAPTER VII 



MANAGEMENT OF GREENHOUSES. (Pages 116-131.) 



Neatness, maintaining correct temperatures, ventilat- 

 ing, firing, watering, shading, propagating, potting, feed- 

 ing, cultivation, fumigation, treatment for disease, gen- 

 eral repairs on the greenhouse, care of hotbeds and cold- 

 frames, system and business principles .... 89-103 



