

FIG. 305— LON(j v^AVlTIES EXCAVATED THROUGH SEVERAL OPENINGS, AND 

 A SHORT CAVITY EXCAVATED THROUGH ONE OPENING 

 A, Cavities in two trees excavated IhrouKh small openings uut in the trunks. It 

 would be better to make the openinf^s 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. 



