42 BULLETIN 510, TJ. S. DEPARTMENT OF AGRICULTURE. 
(5) In most regions lumber should not be close piled in the open, but should 
be " stuck " with crossers at least 1 inch thick. Lateral spacing is also very 
desirable. Roofing the piles should not be neglected. 
(6) In storage sheds the necessity for piling higher from the ground is very 
apparent in many cases. The same remedies apply here as for pile foundations 
in the open. The sheds should be tightly roofed and the siding should not be 
run down below the bottom of the foundation sills. Free air circulation should 
be allowed from all sides beneath the inclosure. Only thoroughly dry stock 
should be stored in close piles under cover. 
(7) Should fungous outbreaks occur in storage sheds not constructed to meet 
sanitary needs the infected foundation timbers should all be torn out and 
replaced with wood soaked in an antiseptic solution or by concrete or brick. 
In all cases the new foundations should be so constructed as to keep the lumber 
well off the ground, and the soil and timber immediately adjoining the infected 
area should be sprayed or painted with an antiseptic solution of a water-soluble 
salt, like sodium fluorid, mercuric chlorid, zinc chlorid, or copper sulphate. 
Stock which has become infected should never be sold for permanent con- 
struction purposes. The placing of such infected stock in buildings may lead 
to disastrous results, for which the dealer may be held responsible. 
(8) The dipping of yard stock in a water solution of sodium fluorid appears 
advisable from the standpoint of preventing blue stain and incipient infection 
with wood-destroying fungi during storage. 
