Show New Method Devised For Treating Posts A new method of treating fence posts and freshly sawed green lumber lumber lumber lum lum- ber has been originated at the Lake States forest experiment station This procedure the dry salting method consists of applying a mixture mixture mixture mix mix- ture of copper sulphate and sodium dichromate in powder form to the surface of freshly peeled green posts and freshly sawed green lum luni- ber The mixture of these chemicals I dissolves in a humid atmosphere and clings to the surface of moist posts and lumber when applied as asa asa asa a powder The method results in deep penetration penetration pene pene- of the preservative which appears to be firmly fixed in the wood so that it is not readily leached out A definite advantage of this process over ovel any other now available is that treatment can be concentrated at the ground line and top where more protection against decay is needed The resulting posts have an attractive blue color which is not readily leached out and tests indicate that the preservative is relatively relatively relatively rela rela- to staples and wire |