Wood, to Preserve.--In order to prevent wooden posts, piles, etc.,
from rotting, dip the parts to be sunk in the earth in the following
composition:--Fine, hard sand, three hundred parts; powdered chalk,
forty parts; resin, fifty parts; linseed oil, four parts. Heat these
together in a boiler, then add red lead, one part; sulphuric acid, one
part. Mix well together, and use while hot. If too thick, more linseed
oil may be added. This composition when dry attains the consistency of
varnish, and becomes extremely hard.