I 
simple free hand method of p refusing the bore traplament 
against the ed&e of the atone. - !• mrU is' dupli'c.ated 
\ • I 
i 
according to Balfour in that of the ‘ . e 
that the bone is rested on the ground in the latter case 
* 
\ ■ : 
and is classed with the rest pressure process (which see}* 
i 
