THE VIOLET. 



81 



Some have found less trouble from spot and other 

 diseases when the plants are placed in the houses early 

 in the summer, without being planted in the open 

 ground. If this is done, it will be well to take out 

 every third or fourth row of glass. Although sash 

 houses are not desirable on accoiint of the drip, they 

 have tbe advantage of permitting the removal of the 

 roof, and are very commonly used when the plants are 



FIG. 24. NAEKOW VIOLET HOUSE, IMPROVED. 



placed at once in the house without being planted out of 

 doors. 



The use of hot water for heating the house will be 

 preferable, unless it is a part of a large range, when 

 steam may be used. The piping should be sufacient to 

 secure a temperature of forty degrees during the coldest 

 weather. While a few degrees less than this would do 

 no harm, it will be undesirable to have it go much 

 higher, forty-five degrees being as high as the tempera- 

 ture should be raised at night by fire heat. If it ia 

 likely to go above that degree, air should be given. 



