26 GREENHOUSES 



advisable to equip them with steam or hot 

 water pipes, so that they may be heated in 

 case of emergency. In the north, cold- 

 frames are used for wintering violets, pansies 

 and other semi-hardy plants; and farther 

 south, for wintering cabbage, cauliflower and 

 other plants which are started in the fall. 



Fig 12. A cold or storage-pit with shelf for growing 

 violets 



COLD OR STORAGE PITS 



In almost every florist's or vegetable grow- 

 er's establishment there is need for an out- 

 of-the-way frost-proof storage, to which light 

 may be admitted on occasion. Such a stor- 



