OCTOBER. 



451 



appear they are killed by sprinkling with tobacco water, 

 which no insect can withstand ; afterwards the trees are syr- 

 inged with clean water. The wall is left uncovered for a 

 day or two if the weather is favorable ; but if not, these oper- 

 ations are performed without taking down the structure. It 



^ = 



=^ 





^ 



remains up till the peaches and apricots have nearly arrived 

 at maturity, which is about three weeks or a month before 

 ripe fruits can be obtained from unprotected walls. The 

 period of ripening depends, of course, upon the season being 

 more or less favorable. The sashes, when taken off, are laid 

 aside till the following spring, whilst the trees, exposed to the 

 influences of the atmosphere, regain their vegetation and 

 productive vigor for the following year. 



