1bow Dew 10 fformefc. 123 



Heat radiation from the earth goes on in 

 winter, which is evidenced by the fact that a 

 thick covering of snow is a great benefit to 

 vegetation as a protection against the in- 

 jurious effects of frost. The writer has seen 

 flowers blooming abundantly at an altitude of 

 12,000 feet above the sea-level, protected only 

 by the friendly shelter of a snowbank. In 

 some cases the blooming flowers were in actual 

 contact with the snow. By experiment it has 

 been determined that the earth under a thick 

 coating of snow is usually warmer by nine or 

 ten degrees than the air immediately above the 

 snow covering. 



