a maximumcoarseness at c2, with another change to extremefineness at /3, at a depth of about | in. Beyondthis point the grain increases uniformly until thenormal size is reached at a depth of i in., as indi-cated by photograph No. 36, and the diagram ofgrain sizes. These changes in grain size are… … No. 25. ty^ In. Below Tread. No. 26. 2% In. Below Tread. MICROPHOTOGRAPHS OF WHEEL F. 88 DIAMETERS. 45 by a study of the physical and chemical tests. It isapparent that the Schoen wheel is quite equal tothe best tires, as regards depth of finish and thefineness of the grain in the steel. N?l.
Railroad cars
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