. Electric railway journal . ked by borers; six (18 per cent) had been severelyattacked and two (six per cent) were so damaged asto be unfit for further use. These percentages weretypical of the entire lot, it is reported, and about 70per cent of the 600 are to be redriven just as they fact, this percentage of poles suitable for redriving, itis reported, applies approximately to the entire 14,000piles.* Those not as suitable showed damage only be-tween mud line and high-water mark, and other portionsof these piles were in good condition. The results of this study are believed to confirm
. Electric railway journal . ked by borers; six (18 per cent) had been severelyattacked and two (six per cent) were so damaged asto be unfit for further use. These percentages weretypical of the entire lot, it is reported, and about 70per cent of the 600 are to be redriven just as they fact, this percentage of poles suitable for redriving, itis reported, applies approximately to the entire 14,000piles.* Those not as suitable showed damage only be-tween mud line and high-water mark, and other portionsof these piles were in good condition. The results of this study are believed to confirm thetheory that a creosoted pile is absolutely immune fromattack of marine borers such as exist in Pacific Coastwaters, so long as the shell or portion of the pile im-pregnated with creosote remains intact. If the borercan gain access to the inner and untreated core throughsome defect in the wood, he will work upward and down-ward in the untreated wood, but in no case have tracesof borers been found in the creosoted
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