( 2 9 ) 



every month's confumption, beginning with 

 the month of March, that being the time 

 about which there is generally an end to the 

 ftores of provifion collected from winter con- 

 fumption. I recommend multiplying the 

 ditches, becaufe that thefe roots, when they 

 are expofed to much air, after having been 

 long deprived of it, will not keep for a long 

 time frefh : and this inconvenience may be 

 prevented by multiplying the number of 

 ditches. 



§ XV. 



The Necejfity and Manner of making a Vent. 



It is abfolutely neceffary that every ditch 

 mould have a vent, by which the fermenta- 

 tion of the roots may be exhaled : without 

 this precaution, all that you attempt to pre- 

 ferve under-ground, will be rotted or fpoiled. 

 I will point out the manner in which this 

 vent Ihould be made. Before any thing is 

 put into the ditch, you mould fet up in the 

 middle of it a fmall pole, of fix or feven 



feet 



