. American engineer . Interior of Self-Clearing Ore Car. operating with a minimum cost for maintenance and operation.■ The trucks are of the arch bar type with 5A in. x 10 in. jour-nals and ha\e pressed steel bath tub type bolsters and pressed. Steel Self-Clearing. Quick-Dumping Ore Car for the Northwest. modern practice, every detail having been worked out with careto secure strength and highest efficiency. The dis-tributicjn of material is such as to give lowest possible weight steel brake beams. Several hundred cars of this type have beenin service on the Duluth & Iron Range, and t
. American engineer . Interior of Self-Clearing Ore Car. operating with a minimum cost for maintenance and operation.■ The trucks are of the arch bar type with 5A in. x 10 in. jour-nals and ha\e pressed steel bath tub type bolsters and pressed. Steel Self-Clearing. Quick-Dumping Ore Car for the Northwest. modern practice, every detail having been worked out with careto secure strength and highest efficiency. The dis-tributicjn of material is such as to give lowest possible weight steel brake beams. Several hundred cars of this type have beenin service on the Duluth & Iron Range, and the Duhith. Missabc& Xorthern for over a year, and have given satisfactory results. June, 1912. AMERICAN ENGINEER. 321 TESTS OF JAGOBS-SHUPERT FIREBOX. A progress report of the comparative tests being made atCoatesville, Pa., between two boilers, one with a radial stayfirebox, and the other with a Jacobs-Shupert firebox, has beenmade by Dr. W. F. M. Goss, under whose direction the work isbeing conducted. This report is as follows: The tests of Series A, have been entirely completed, with re-sults which in general terms arc set forth below. Tlie Boilers.—Both boilers are identical in their general di-mensions which are as follow
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
