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The same agency laid an unprotected core from Varna to the Crimea, and it lasted until the winter set in; it is ceaselessly said that it was minimize by order of the French commander-in-chief, however there is no such thing as a proof of this, and I'm not disposed to believe it. Every phrase of this may be written at the present moment, that's, ten years later, with exactly the identical significance. It is named the "Product Integraph." Dr. Vannevar Bush, of the Massachusetts Institute of Technology, one among its makers, says that it could be classed "as an including machine carried to an extreme design. Where employees within the business world are ordinarily satisfied with addition, subtraction, multiplication and division of numbers, the engineer deals with curves and graphs which symbolize for him the previous, present and future of the issues through which he offers." The machine works particularly in this field of graphs and curves. This is especially efficient where there are numerous stumps or bowlders, for the reason that logs are carried high enough to clear such ground obstacles.

While diggers should at all times call local authorities earlier than breaking floor to stop cutting cables, other warnings are sometimes essential. Notwithstanding, Mr. Newall's partiality for mild cables, he suggests on the shut of his evidence what I assume he would consider the most excellent form of cable. There is still nice room for improvement upon the present technique of protecting the external overlaying; of cables, and i commend it to the further cautious research of telegraph-engineers as a subject of very important importance. I believe this economy would be at the expense of safety, and that the cable of the long run will be even heavier, more good, and extra expensive, than the cable of the present day.-Abstract of Address before the Statistical Society. One experienced gentleman in his evidence stated these cables were "comparable to no person ought to have laid in deep water." It's sufficient at present to know that they have failed from neglect or inexperience, and that they, among different failures, have established the rules which have since insured success. Cables have been recovered from depths of 1,200 fathoms with all the hemp eaten away, and the core pitted with these marine animals. Ten years ago it was usually believed that water had very little motion below 50 fathoms, and one hundred fathoms was thought-about a degree of great safety.

A fantastic cause of harm to cables is the corrosion of the exterior wires, caused by moving water or marine vegetation, etc., and this has established the overall practice of overlaying the exterior wires with tarred yarn saturated with a mixture of pitch and silica. The want of constant supervision by engineers, solely in the interests of the purchasers of the cable, has been an amazing trigger of defective cables. There needs to be constant supervision, and a file of all of the checks kept for the purchasers of the cable from the commencement of the contract to its final completion, and continued ever afterward by the purchasers. From its top, or from the highest of another excessive tree, a gang of men, with the help of the tractor's winches, runs a steel cable to a different tree, in all probability half a mile away down the hill. Half one million feet of logs lately escaped from a predominant boom at Merced Falls, Calif., throughout a sudden rise within the river and jammed in opposition to an irrigation dam three miles down the stream.

With two tractors and six men, one California lumber company has lower and delivered, to the pond at the mill, 40,000 toes of lumber a day. Every single day of my expertise in watching over the permanence of the 10,000 miles of cable beneath my care, confirms me within the opinion that too nice caution and vigilance cannot be exercised in the making and laying a thread which is to be faraway from all human vision ceaselessly, and designed to earn dividends by continuing an ideal conductor of electricity. One of the best form of mild cable I've seen is the copper-coated core invented by Mr. Siemens (No. 8). I ought to have anticipated that, if any light cable could have been profitable, this one would have met all the conditions, excepting that of excessive cheapness, nevertheless it has not been so uniformly successful because the heavy iron-clad cables. Mr. Siemens produced earlier than the committee a chunk of the core of the Corfu cable injured by lightning; the land-line had been struck, and, from the absence of any lightning-guards, the cable was damaged.

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