

FIG. 305 LONG CAVITIES EXCAVATED THROUGH SEVERAL OPENINGS, AND 



A SHORT CAVITY EXCAVATED THROUGH ONE OPENING 

 A, Cavities in two trees excavated through small openings cut in the trunks. It 

 would be better to make the openings oval and pointed rather than square or 

 round. B, An old injury caused by horses gnawing the bark. C, The injury shown 

 in B excavated and ready for tarring prior to filling. 



