SCIENCE OF SUCCESSFUL THRESHING. 



better than more. Keep about fifteen inches of the front of 

 the ash pan clean, to allow plenty of draft, but let ashes 



WAGON JOP 



0000000 MOO 000 00 00 



FIG. 6. SECTIONAL VIEW OF FIRE BOX FOR B URNING STRAW . 



fill up in the rear part. Four bricks must be used. Keep 

 rear draft door shut. 



The flame coming Over the brick arch as seen through 



e peep hole should appear white hot, and should be con- 



ious and not be stopped or checked each time the straw is 



pushed in, as will be the case if firing be too heavy or too 



nud, be put in at a time. Sometimes straw, especially 



when damp, i s pu]led over againgt ^ ^ Qf ^ ^ 



This may be scraped off with the poker, through the peep- 

 ole. The tubes should be cleaned once a day 



