24 STATE FORESTRY PROJECTS 



5. Seasoned, not treated. 



6. Green, butts charred. 



7. Seasoned, butts charred. 



8. Seasoned, butts brush treated with creosote. 



9. Seasoned, butts treated with creosote, open tank. 



10. Other preservative treatments, crude oil, copper sulphate, 

 Etc. 



SOURCE AND COST OF PRESERVATIVES. In connection with the 

 matter of treating the posts, some study should be given to the se- 

 curing of creosote at the lowest possible cost. 



By products of this nature, produced by our local gas plants in 

 the state, should therefore be given a thorough trial. 



RECORDS. Carefully kept records form an essential part of 

 this work and make it possible to continue it without confusion or 

 loss of information. The card-filing system of keeping all records 

 of treating, setting and inspecting the posts, will be used. 



Each method of treatment used shall be described on a num- 

 bered card, with date ; kind of material used ; source of material ; 

 cost of material; a detailed description of the process, length of 

 time, amount of material used, penetration and absorption per post, 

 and any other information of importance. 



Each post is to be numbered in such a way as to be easily 

 identified any time during its period of service. 



A record card is to be kept for each individual post. This 

 card shall bear the following data : 



Xumber of post; species of timber; size and form; source of 

 the timber; date when cut; number of the treatment given; condi- 

 tion of the timber when treated; date of setting the post; locality 

 where set ; soil conditions where set ; itemized costs of post ; treat- 

 ment, setting, total cost of post set. The card shall also bear an 

 inspection record showing each inspection period, and the estimated 

 condition of the post at each inspection. 



Inspection of the post should be made each year, for untreated 

 posts, and for treated posts as often as necessary to know their con- 

 dition. As decay is usually most rapid close to the ground sur- 

 face, the post may be examined quite readily by removing the soil 

 to a depth of four or five inches at one side. 



C. GROWING CHEAP EENCE POST TIMBER ON COLORADO 

 EARMS. A study should be made of the production of cheap tim- 

 ber suited for fence posts, to be treated with some inexpensive and 

 efficient preservative. 



a. Study the trees now growing on the farms, along ditch 

 banks, in timber plantations, and the native second growth along 

 rivers and streams ; 



b. Determine the rate of growth of each species under the 



