40 



GREENHOUSES 



boiler pit, or in large establishments by the 

 use of pumps or steam traps which will be 

 discussed in the chapters on heating. 



Size of House. There is no authentic data 

 on the comparative efficiency of small and 

 large houses. The large houses are relative- 

 ly lighter, but there are other considerations. 



Sf vjc BUILDING 



AND 



20 



2.1 



Fig. 22. Ground plan of range shown in Fig. 21 



As a rule the eastern growers favor separate 

 large, high and wide houses while those of 

 the Middle West prefer lower and narrower 

 connected houses. The present tendency is 

 to build larger houses than formerly. Of 

 160 florists and vegetable growers whom the 

 author has consulted, 148 or 88 per cent, ex- 

 pressed themselves in favor of houses rang- 

 ing from 24 to 40 feet in width. These are 

 undoubtedly the most popular widths at the 

 present time, the length varying from 100 



