CONTENTS Xlll 



PAGES 



themum, 180 Sweet pea, 180 Scale of points of florists' 



plants, 180. 

 Sample Rules to Govern Exhibitions .181 



Massachusetts Horticultural Society rules, 181. 

 Nomenclature Rules .......... 183 



Rules for naming kitchen-garden vegetables, 183 American 



Pomological Society rules of nomenclature, 183. 

 Emblematic Plants and Flowers 185 



State flowers, 185 National and regional flowers, 186 Party 



flowers, 186. 



CHAPTER XI 



GREENHOUSE AND WINDOW-GARDEN WORK ..... 187-201 



Greenhouse Practice .......... 187 



Potting earth, 187 Suggestions for potting plants, 188 Wat- 

 ering greenhouse and window plants, 188 Liquid manure for 

 greenhouses, 188. 



Lists of Plants 189 



Twenty-five plants adapted to window-gardens, 189 Vegetable- 

 growing under glass, 190 Twenty-five useful aquatic and sub- 

 aquatic plants for outdoor use, 191 Commercial plants and 

 flowers, or "florists' plants," 191. 



The Heating of Greenhouses 192 



Methods of proportioning radiating surface for heating of green- 

 houses, 192 Size of pipes connecting radiating surface and the 

 boiler or heater, 194 Table of dimensions of standard wrought- 

 iron pipe, 194 To design heating surface, 195. 



Other Information relating to Heating 195 



Diameters for chimney flues, 195 Effects of wind in cooling 

 glass, 196 Table of radiation for glass, 196 Radiating surface 

 of pipes, 197 Method of finding boiler capacity for cast-iron 

 pipe, 198 Customary temperatures in which plants are grown 

 under glass, 198. 



Various Estimates and Recipes . . . . . . . .198 



Percentage of rays of light reflected from glass roofs at various 

 angles of divergence from the perpendicular, 198 Angle of roof 

 for different heights and widths of house, 199 Standard flower- 

 pots, 199 To prevent boilers from filling with sediment or scale, 

 200 To prepare paper and cloth for hotbed sash, 200 Paint for 

 hot-water pipes, 200 Liquid putty for glazing, 201 Paint for 

 shading greenhouse roofs, 201 To keep flower-pots clean, 201. 



