File:Popular science monthly (1872) (14782287112).jpg

Identifier: popularsciencemo89newyuoft (find matches)
Title: Popular science monthly
Year: 1872 (1870s)
Authors:
Subjects: Science
Publisher: New York : D. Appleton
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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as a worthlessproperty. Now it is being sa\-ed, as shown in the picture, by cutting a trenchacross the pile to check the progress ofthe fire. Although the photograph givesno \isible e^■idence of a fire, proximity tothe radiating heat of the pile would proveto liie onlooker that the interior is averitable inferno. A Damaged Lock - Gate Repaired byIts Own Water WATER swirling out of the locks atSuult Ste. Marie damaged one ofthe gates so badly that the canal engi-neers despaired; but the trouble was sin-gularly righted by allowing water torush in again. A ship had jiassed out ofthe canal, and the lock was allowed todrain, but one of the gates was closedtoo soon, was caught in the rusliingwater, and bulTeteil so rougiih- that thetop was s;)rung more than a foot out ofplumb. Several unsuccessful attemptswere made to repair (he sagging gate b>means of jacks and turntables. Mean-while, a long line of ships from the Northand South was inipalicntly gathering. Popular Science Monthhi 235
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some of them witli perishable cargospromised on early delivery. One of the engineers hit upon tlieingenious if somewhat hazardous schemeof injecting enougli water into the lockto force the gate back into place. Ac-cordingly, the ^•al\•es were turned on,water flowed in, and the gate was slowlypushed back into its old position. While this makeshift repair was satis-factory for the time being, when naviga-tion closed this fall, the gate was entire-ly repaired. This is the new Xumber three lock,which was put in commission about ayear ago to cope with the increasingfreight and passenger traffic betweenLake Superior and the lower lakes. Taking the Smoke Out of theSmokiest City How Pittsburgh Has Solved Its Most Irksome Problem The public now knows that smoke means a waste of fuel;that a waste of fuel is a waste of money, and that a wasteof money is bad business management. The Bureau of Minessays that the best smoke preventer known to science todayis a conscientious and careful fireman,

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