LIST OF ILLUSTRATIONS XV11 



Fig. Page 



45. Lettuce plants in flats 138 



46. Utilizing shelf space in an overcrowded house. Unfair 



to the plants in the beds underneath 139 



47. Flat with wire mesh bottom 140 



48. Cucumber plants growing in pots and in an adjacent bed 141 



49. Potted cucumber plants in a bed of gladioli 143 



50. Chamber used for the steam sterilization of soil in flats. 



(Note that the flats are on carts) 144 



51. Spotting board used in transplanting lettuce 147 



52. A convenient form of nozzle for greenhouse watering 154 



53. Tile laid in bed for sub-irrigation 157 



54. Overhead irrigation in a lettuce house 159 



55. A convenient homemade cart for handling two barrels at 



a time 167 



56. A handy cart for greenhouse use 168 



57. Harvesting a crop of cucumbers in a large range 170 



58. Corner of packing room in a well-managed establish- 



ment 171 



59. A load of cucumbers en route to shipping station 173 



60. A large root of asparagus suitable for forcing purposes 178 



61. Graph showing returns from asparagus roots of differ- 



ent sizes 181 



62. Rhubarb stalks grown from roots planted in coal ashes 192 



63. Rhubarb growing in coal ashes in "an ordinary cellar 193 



64. Rhubarb growing in a coldframe 195 



65. An inexpensive rhubarb house near Boston. Sash are 



placed on the frame whenever it is desired to force 



the crop 196 



66. A simple house in Maryland for the forcing of rhubarb 197 



67. A large rhubarb root suitable for forcing 198 



68. Rhubarb forced in almost total darkness. Note small 



leaf blades 201 



69. Head lettuce in the Boston district 206 



70. Grand Rapids lettuce in a large Middle West range 207 



71. Cos lettuce on the right; head lettuce on the left 208 



72. Pot experiment at the Pennsylvania State College, show- 



ing the value of lime for lettuce 214 



73. Transplanting board used for setting lettuce. Note 



large pegs 218 



74. Plants of same age. One on left dwarfed because the 



tap root was bent when the plant was set in the bed 219 



75. The lettuce in this large range is cultivated with a 5- 



pronged weeder attached to a long handle 221 



76. Pot-grown plant ready to set in the bed 223 



77. Pot-grown plant ready for market 224 



78. Grand Rapids lettuce 229 



79. A basket of lettuce ready for market 231 



