Chicago : Engineering and Contracting Pub. Co. · leaf 361
the North andSouth points are marked on it, corre»pond- the case more tests are made and so far wehave always been able to ascertain which arewrong. We have made tests at a depth of2,000 ft., but it would probably be difficultto go much deeper without using more in-sulating wrapping around the… … 10 30 40 50 60 10Angle Eiched on Tubes 30 30
Buildings
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