Treatment of ll'esteni Yellow I'ine 



111 



TABLE 9. 



* Including framing, hauling and erecting but not stepping, shaving 

 or painting. 



* Estimating the life of untreated pine at 3 years, which is a very 

 liberal estimate. 



the pole in the line. As a pole timber, yellow pine is harder to 

 shave and to climb than cedar. It grows in perfect pole form. 



The results of the study emphasize the importance of thor- 

 oughly seasoning and treating this timber before use. If pos- 

 sible the empty-cell tank treatment with creosote should be ap- 

 plied. The next treatment in value is that with zinc chloride 

 which requires a less expensive plant. Finally wherever it is 

 impossible to give a tank treatment, brush treatments with creo- 

 sote or carbolineum more than pay for the added cost. 



The poles used in these experiments are now in service in a 

 California power line. After three years none of the poles 

 treate^ in the tanks with creosote, zinc chloride, or crude petro- 

 leum show sign of decay. The brush treated poles are beginning 

 to decay while untreated stubbs from poles cut each season, 

 which were set as checks, were rotted off completely in less than 

 two years. 



