. Electric railway journal . The butt ofthe pole, or that part of its length extending from its buttend to about 1 ft. above the ground line, it is of primaryimportance to protect. For a partial treatment such asthis, the necessary apparatus is an open iron tank about 8 , fitted with steam coils arranged along the bottom orsides, together with a tank for the storage of the preserva-tive, and a boiler for generating steam. If the amount oftimber warrants the additional expense, the treatment canbe hastened and cheapened by adding an underground re-ceiving tank for holding the heated oil
. Electric railway journal . The butt ofthe pole, or that part of its length extending from its buttend to about 1 ft. above the ground line, it is of primaryimportance to protect. For a partial treatment such asthis, the necessary apparatus is an open iron tank about 8 , fitted with steam coils arranged along the bottom orsides, together with a tank for the storage of the preserva-tive, and a boiler for generating steam. If the amount oftimber warrants the additional expense, the treatment canbe hastened and cheapened by adding an underground re-ceiving tank for holding the heated oil used in the firstbath, a pump to convey the liquid from the receiving tothe storage tank, and a steam hoist for convenient loadingand unloading. By the pressure-cylinder method it is nec-essary to treat the entire pole instead of 5 ft. or 6 ft. at thebutt, and to inject just as much preservative in the naturallydurable top as in the danger zone near the ground saving in the preservative brought about by the treat-. Treating Cylinder of Non-Pressure Plant at Winnfield, La. ment of 5 ft. or 6 ft. of the whole length, instead of 30 ft.,is readily apparent. An open-tank plant for the butt treatment of 150 polesdaily can be constructed for about $2,000, while a non-pressure plant equipped with a closed cylindrical treatingtank for the treatment of the entire length of these poleswould cost about $10,000. For the treatment of ties, a closed cylindrical treatingtank is preferable, although a non-pressure method of ap-plication may be adopted. A non-pressure plant for thetreatment of 350 seasoned ties per day of 12 hr. can becompletely installed for about $5,000 to $7,000. During the past year the Forest Service supervised the April 3, 1909.] ELECTRIC RAILWAY JOURNAL. 631 design and installation of three non-pressure plants forthe treatment of seasoned loblolly pine. Both ties and polesof this species have been successfully treated at a minimumexpense. In addition, round timbe
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