. Electric railway journal . 9, page 592, andDec. 20, 1919, page 1006. While much has been written upon the subject ofthe influence of different steels used in rail manufac-ture, upon the rate of wear, we have very little pub-lished data covering this matter as it affects streetrailway rails. Comparisons of manganese, bessemer,nickel and open-hearth steels in curves have occasionallyappeared but similar comparisons affecting tangent tracks are wanting. There is a need for carefullyprepared data of this character. Meanwhile, throughexperiments being conducted with silicon steel in GreatBritain
. Electric railway journal . 9, page 592, andDec. 20, 1919, page 1006. While much has been written upon the subject ofthe influence of different steels used in rail manufac-ture, upon the rate of wear, we have very little pub-lished data covering this matter as it affects streetrailway rails. Comparisons of manganese, bessemer,nickel and open-hearth steels in curves have occasionallyappeared but similar comparisons affecting tangent tracks are wanting. There is a need for carefullyprepared data of this character. Meanwhile, throughexperiments being conducted with silicon steel in GreatBritain we have some very definite information, provingthat composition does influence wear. Mr. Moxhamendeavored to prove this in his Brooklyn experimentsand his early conclusions tended to show a vast differ-ence in rate of wear upon hard and soft steel butthe writers recent discussion of that expeiriment tendedto show that it was somewhat inconclusive. ^\BAS/CBESSEMER STEEL [1,640,000 C^*i< BR/TISH 5TD. SPEC\SPEED 3 6 9 ir 15^ fig. 14—COMPARATIVE WEAR OF RAILS 18 The diagram in Fig. 14, taken from Mr. Holts book,gives conclusive evidence of the fact that chemical com-position of rail steel has an appreciable effect in con-trolling the rate of wear. He states that the use ofsilicon steel, in place of bessemer steel, for rails hasthe effect of increasing the rail-life by fully 33 percent. It should be noted that silicon steel is tougherand more dense than basic bessemer and that Mox-hams experiments long ago proved that what is neededis a steel of greater density. In this country, open-hearth steel has practicallyreplaced bessemer steel for use in rails, while siliconsteel has had very little use. The committee on railof the American Railway Engineering Association inits 1918 report stated that, as a result of various tests,the abrasion of high rails per million tons of traffic oncurves of 8 or 9 deg. or less could roughly be takenas follows: Manganese,
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