FESTS 103 



may be applied, even on an extended scale, by 

 using smoke for the purpose. Smudges, or smoky 

 fires or lamps, are placed ready at various points in 

 the plantations, and are lighted whenever a night 

 frost is expected. The heat developed, as well as 

 the smoke formed, helps to keep the air warmer. 

 Very little, however, has been done in this matter 

 in England, and we are still in want of methods 

 for producing such smudge fires conveniently and 

 economically. Heaps of rubbish and trimmings are 

 of very little use for the purpose. 



