184 OUR NATIONAL FORESTS 



all contracts that the purchaser must place himself 

 and employees, as well as the employees of his con- 

 tractors, at the disposal of authorized Forest offi- 

 cers for fighting fires. Reimbursement is made for 

 such services at the wages in vogue for fighting 

 fires on the National Forest in question, unless the 

 fire threatens the timber of the purchaser or prop- 

 erty of the operator, or is started in connection with 

 the operation. Under these conditions the pur- 

 chaser is expected to furnish his available em- 

 ployees to assist the Government in fire fighting 

 without charge. Efficient spark arresters are re- 

 quired on wood and coal burning boilers or locomo- 

 tives. Inflammable material must be cleaned up 

 in the vicinity of logging engines, and other precau- 

 tions taken to insure against fire spreading from 

 this source. Snags and diseased trees upon the sale 

 area must usually be felled, whether merchantable 

 or not, in order to remove fire menace and to check 

 the spread of timber infestations and pests. 



Special Contract Clauses. Special clauses are 

 inserted in contracts to meet peculiar and unusual 

 conditions. These deal with the number of men 

 the company is to furnish for brush burning; the 

 time of the year this work is to be done; the con- 



