TEMPERATURE. 133 



frame will burn up on a bright day unless air is 

 properly given. Watch the conditions carefully 

 and give air when the plants need it. Often it 

 will only be necessary to raise one frame in five an 

 inch or two in the back. Then again it may be 

 necessary to raise all three or four inches to keep 

 the plants from suffering. On mild days in winter 

 it will improve the plants to occasionally take the 

 frames entirely off, allowing the air to dry out the 

 soil and the sun to warm it. Snow must be re- 

 moved as soon as possible, but it often happens 

 that a good coating of snow will save the plants 

 from freezing. If it promises to be very cold after 

 a snow it is best to leave the latter on for twenty- 

 four or even for forty-eight hours. If left longer 

 than this the plants may suffer for want of light. 



It may be of interest to give in tabulated 

 form the temperature records of a violet house for 

 five months of the winter period. These records, 

 which were made for the writer by Mr. Geo. Salt- 

 ford, of Poughkeepsie, New York, show the high- 

 est, lowest, and average temperatures recorded 

 during the day and also during the night in his 

 houses. A study of the records will be of value 

 to those who desire to keep their houses in the 

 proper condition so far as temperature is con- 

 cerned. Although made at Poughkeepsie, the 

 records are applicable to most sections where 

 violets are grown. 



