. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 33 Second, to remove all decayed tissue, which is done by a thorough cleaning out of the cavities. Third, to treat antiseptically all those exposed tissues which are susceptible to decay, preventing further disintegration. Fourth, to fill the cavity with some substance such as cement or to cover the surface with metal or other substance, in order that the callus may grow over the cavity and form a smooth surface. Fifth, to strengthen the tree. This may follow immediately as a result of filling, or ultimat
. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 33 Second, to remove all decayed tissue, which is done by a thorough cleaning out of the cavities. Third, to treat antiseptically all those exposed tissues which are susceptible to decay, preventing further disintegration. Fourth, to fill the cavity with some substance such as cement or to cover the surface with metal or other substance, in order that the callus may grow over the cavity and form a smooth surface. Fifth, to strengthen the tree. This may follow immediately as a result of filling, or ultimately in the processes of growth, and some- times is not accomplished at all. Exposed tissues in cavities are treated with creosote or other sub- stances to serve as an effective antiseptic. The cavities are ' filled with grouting composed of one part of cement to five parts of sand and gravel, over [\ which is spread a coating one- half to one inch thick of one part of cement to two parts of fine sand. The grouting should be put in very soft, and the ce- ment coating, which is put over the surface, should be soft enough to go on easily with a trowel. The grouting is kept back an inch or so from the surface of the wood. It can be held in place while soft by boards loosely fitted to the orifice of the cavity. â. cu ⢠^u j f i, ⢠â ' Fig. 13. Showing improper method of chain- Many unsatisfactory fillings '"« t^^^^- 1^°"*^^ "'"^^ ^^°^ '""â¢â « effective . method, b, bolt, c, chain. have been made by using the cement too dry, with the result that it possesses no strength. After the cement has been put in the cavity it should be well trowelled and kept moist for a few days. In all cases the cementing, when complete, should be flush with the wood and the cavity so shaped, when practicable, that it forms a wedge for the cement, thus pievent- ins: it from falling: Please note that these images are extracted from scanned page imag
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