PROTECTING WOODS AGAINST TERMITES. 

 Table 1. — Treatment and description of stakes, etc — Continued. 







Weight 





Ab- 

 sorp- 

 tion. 



Num- 

 ber of 





Dimen- 



Square 



inches 



of 



Treatment and stake 

 No. 



Species 

 of pine. 



before 

 treat- 



Weight after 

 treatment. 



annual 

 rings 



Condition. 



sions of 

 cross 







ment. 





per 

 inch. 





section. 



wood. 



Dipping,carb olineum : 





Pounds. 



Pounds. 



Lbs. 







Inches. 





Stake 97 



Shortleaf. 

 ...do 



3.57 

 4.22 



3.64 



4.28 



0.07 

 .06 



7 

 9 





1.97X4.25 

 1.94X4.20 



None. 



98 



None. 



99 



...do 



4.10 



4.18 



.08 



6 





2.08X4.27 



None. 



100 



...do 



3.84 



3.91 



.07 



7 



do 



2.07X4.23 



None. 



101 



...do 



4.04 



4.12 



.08 



5 



do 



2.00X4.12 



None. 



102 



...do 



3.93 



3.99 



.06 



4 



Large knot. 



1.98X3.73 



None. 



103 



...do 



3.79 



3.87 



.08 



7 





2.04X4.00 



None. 



104 



...do 



3.64 



3.73 



.09 



4 



do 



2.07X3.90 



None. 



105 



...do 



3.39 



3.45 



.06 



5 



do 



1.90X3.75 



None. 



106 



...do 



3.47 



3.56 



.09 



5 



do 



2.06X3.88 



None. 



107 



...do 



4.07 



4.18 



.11 



6 



Large knot. 



1.95X3.93 



None. 



108 



...do 



3.43 



3.53 



.10 



4 



do 



2.00X3.75 



None. 



Stakes 1 to 12, inclusive, were treated by the open-tank process 

 with coal-tar creosote, Laboratory Shipment No. 154. The preserva- 

 tive was first heated to from 212° to 220° F., whereupon the speci- 

 mens were immersed, the charge being held at the foregoing tem- 

 perature for 1^ hours. The charge was then allowed to> cool, after 

 which the specimens were removed and weighed. This process was 

 repeated, the specimens being finally allowed to stand in the pre- 

 servative overnight. The average absorption at the completion of 

 the treatment was approximately 8 pounds per cubic foot. 



Stakes 13 to 21/., inclusive, were treated by the open-tank process 

 with wood creosote obtained from a turpentine company, Laboratory 

 Shipment No. 126. The specimens were immersed in the preserva- 

 tive at a temperature of 180° F. for 1|- hours, after which the charge 

 was permitted to cool overnight. 



Stakes 25 to 36, inclusive, were charred by permitting them to burn 

 for approximately five minutes in an open fire. 



Stakes 37 to 48, inclusive, were merely dipped in coal-tar creosote, 

 Laboratory Shipment No. 154, at a temperature of 216° F. 



Stakes J+9 to 60, inclusive, were brush-treated with coal-tar creo- 

 sote, Laboratory Shipment No. 154. The temperature of the pre- 

 servative was 216° F., and three coats were applied at intervals of 

 24 hours. 



Stakes 61 to 72, inclusive, were merely dipped in wood creosote 

 secured from a turpentine company, Laboratory Shipment No. 126, 

 at a temperature of 180° F. 



Stakes 73 to 84, inclusive, were brush-treated with wood creosote 

 from a turpentine company, Laboratory Shipment No. 126, three 

 coats being given at a temperature of 180° F. at intervals of 24 hours. 



Stakes 85 to 96, inclusive, were brush-treated with a high-grade 

 carbolineum, three coats of the preservative being applied at a tem- 

 perature of 170° F. at intervals of 24 hours. 



Stakes 97 to 108, inclusive, were merely dipped in a high-grade 

 carbolineum at a temperature of 170° F. 



Thus 108 stakes were treated in all, numbered from 1 to 108. 



