12 FORESTRY IN COLORADO 



diameter, and by removing one of the heads by means of a cold 

 chisel or otherwise, a tank 34 inches deep remains. This tank, 

 which is heavy enough to serve the purpose of post treating, may 

 be supported upon two iron cross-bars built into the sides of a 

 brick or stonework fire place. Such a tank will hold about 10 or 12 

 posts of ordinary size at one time. 



Perhaps the most convenient way of using such a small outfit 

 without much attention is to 1 fill it with posts and creosote either at 

 night or in the morning and heat it to the required temperature 

 with a small fire. The posts may be left in until the end of 24 hours 

 and another lot put in. In this way the posts are 'given an excel- 

 lent opportunity to absorb creosote while but little time will be 

 taken from other work. 



Whenever it is desired to make continuous treatment, the most 

 effective method is to keep the creosote and treating tank heated to 

 the temperature of boling water, continuously, while a barrel of 

 cold creosote, open at one end, is kept at hand. The treating tank 

 is filled with posts which are kept in the hot liquid for about an hour, 

 after which they should be removed and at once plunged into the 

 cold creosote, where they are to remain an equal length of time. 

 In this way the process can be made nearly continuous and a large 

 number of posts may be treated in one day. When the posts are 

 removed from the cold creosote, they should be placed with the butt 

 ends in an inclined trough with a pail at the lower end to catch the 

 excess oil which may cling to them. 



Care should be taken not to heat the creosote much above the 

 temperature of boiling water, otherwise considerable of it will be 

 lost by evaporation. The temperature may be determined roughly 

 without a thermometer by hanging a small tin can containing a lit- 

 tle water into the top of the treating tank. When the water in the 

 can begins to boil, the creosote has reached the desired temperature. 



While most any species of timber may be profitable treated in 

 this way, it is particularly useful in treating the rapidly growing, 

 cheap timbers which can be readily grown on many Colorado farm.s 

 It is equally useful in the treatment of the cheaper imported tim- 

 bers, and when properly performed will lengthen their ordinary 

 period of usefulness from two to four times. 



FOREST STATIONS TO BE USED AS STATE FOREST 



RESERVES 



Under a special Act of Congress two years ago, the State 

 Agricultural College of Colorado was granted the privilege of se- 

 lecting certain tracts of forest land lying either within the national 

 forest or the public domain for use in carrying on the work of 



