File:The Street railway journal (1907) (14573397778).jpg

Identifier: streetrailwayjo301907newy (find matches)
Title: The Street railway journal
Year: 1884 (1880s)
Authors:
Subjects: Street-railroads Electric railroads Transportation
Publisher: New York : McGraw Pub. Co.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
t issomewhat widely advocated though the possibility of prov-ing it a valid one was rather remote. It does not seem thata careful consideration of the matter could lead one tothink that the action of the rolls or the vagaries of the ef*fects of segregation on the chemical composition of therail could produce regular alternations of hardness andsoftness. As a matter of fact-this investigation did not showthat there was the slightest trace of any such action. Whilethere was some variation in hardness, the variations thatwere manifested bore no relation whatever to the profile ofthe head of the rail. To the diagrams showing the profile of the three railsthere has been added a dotted line showing, on a greatlyexaggerated scale, the variations in hardness. It will beseen that these do not rise and fall in any sort of harmonywith the profiles. The variations were most pronounced inthe girder rail from the Boston Elevated Railroad. Butthese variations appear mostly in the form, of hard spots
Text Appearing After Image:
5o8 that were probably developed in the rail by the service whichit had been called upon to render, rather than by a defectinherent in the rail itself. With the T-rail from Milwau-kee, rolled by the Lorain Steel Company, there is a practical uniformity of hardness throughout its whole extent. While these tests might well be considered too meagreupon which to have based a positive statement that corru-gations are caused by variations of hardness, it is quiteevident that had such a cause existed it would have shownsome evidence of it in one of the three rails that were tested.And as no such evidence did appear in any way, shape 01manner, it seems quite reasonable to conclude that it doesnot exist, and that therefore we may eliminate this varia-tion of hardness from among the possible causes of railcorrugation. TEST OF A COMBINED RAILWAY AND LIGHTING PLANT The economy of combined railway and lighting plants isof general interest on account of the division of the loadbetween several class

Note About Images