Show EAT A callb j i the tonquin one year though protected professor boudler at the paris demy of been the destruction of a telegraphic cable by cable was luj inTon quinin 1884 ani wa composed of seven copper wires protected by an insulating envelope coated with cotton and alto in addition to tins it was placed in a leaden pipe all these precautions the cable which wa laid on a marshy toil began to show eins of decay in 1893 and it was found necessary to replace it in the spring of the year on examining the cavities in the pro envelope M bouvier discovered that they had been maje by termites milne edwards commenting on the protea eore address said that it was not the first time that injury to metals by incepts bad been noted during the crimean war bullets were found to have ben b en perforated by hymenoptera which came from the deal boards of which the packing cases had been made M bouvier advised the use of sulphate of cop per as a preventive measure lie con tended that to protect a cable it would suffice to steep the cotton and jute in a Bo lulion ot that salt exchange |