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neither is it in such an equable state of moisture as the deeply 
uried portion from which air is excluded. Decay usually 
cheapness, the exposed parts being coloured by a thin tar oil, 
a i é may be 
attacked by fungus; at the same time it is only profitable to pre- 
, 3 
usually heavy tar oils or plea petroleum, or those oils may 
be mixed with another substance. The commonest and most 
popular antiseptic in this country, apart from ordinary paints, 
is dead oil of tar, commonly, 
which may be applied cold but is more often injected in a heate 
