42 BULLETIN 510^ U. S, DEPARTMENT OP AGEICULTUEE. 



(5) 111 most regions lumber should not be close piled in the open, but sliould 

 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. 



