CONTENTS 



Pages 



CHAPTER I 

 A GENERAL VIEW 1 



Vegetable forcing The history of vegetable forcing 

 Prominent sections Importance of vegetable forcing 

 Types of vegetable forcing Organization Southern 

 competition The superior quality of greenhouse vege- 

 tables Economic production Capital required Profits 

 Location Climatic influences Relative importance of 

 forcing crops The outlook. 



CHAPTER II 



GREENHOUSE CONSTRUCTION AND HEATING __ . 13 



Greenhouses vs. frames Site and position of house 

 Grading Size and proportions Materials Arrange- 

 ment of houses Forms of greenhouses Wood con- 

 struction Semi-iron construction Iron construction 

 Truss construction Walls Frame Wall plate or sill 

 The eaves or side plates Sash-bars Roof Venti- 

 lators Posts, purlins and braces Doors Glass Glaz- 

 ing Shading Painting Beds and benches Walks, 

 alleys and roadways Steam vs. hot water heating 

 Radiation required Systems of hot water heating 

 Systems of steam heating Location of pipes The 

 boiler Thermostats. 



CHAPTER III 

 SOILS 47 



Selection Greenhouse soils abnormal Texture Struc- 

 ture Color Organic content Water content Chemi- 

 cal composition Depth Drainage Muck soil Boston 

 soils Chester fine sandy loam Ashtabula soils Cleve- 

 land soils Toledo soils Lansdale silt loam Norfolk 

 series Irondequoit soils Soil adaptation. 



CHAPTER IV 



MANURES, LIME AND FERTILIZERS 59 



Need of plant food Value of manures Rhode Island 

 IX 



