HOLLOW TRUNKS 25 



When the cavity has become quite dry a 

 matter of considerable importance it should 

 be treated with creosote or carbolineum and 

 afterwards filled with concrete in the propor- 

 tion of one part of cement to four of clean 

 gravel. Ram the concrete firm, so that the 

 cavity is perfectly filled, and finish off at the 

 orifice with pure cement, and in such a way 

 that the cambium may be induced to form a 

 growth over the edge of the filling. 



A cheap but temporary method of dealing 

 with small hollows and cavities in fruit and 

 other trees is to fill these with a mixture of 

 clay and cow-dung in the proportion of two 

 of the former to one of the latter. Knead 

 well, and apply when of the consistency of 

 putty, cleaning and disinfecting the hollows 

 before filling. 



Regarding tools in the treatment of certain 

 cavities, much difficulty is often experienced 

 in removing the dead wood, disinfecting the 

 interior, and filling with a suitable composition. 

 Various tools must be used for the purpose, 

 and occasionally the aperture will require to 

 be widened in order that the work may be 



