English: Railroad track spirit level in place indicating 5" of superelevation between the inside and outside rail of a curve along the Keystone Corridor near Narberth, PA.
Date
15 February 2013 (original upload date)
Source
Own work (Original text: 1850's vintage track spirit level from the Cooper Collection of American Railroadiana; photographs and composite illustration by the uploader (Centpacrr).)
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue
The original description page was here. All following user names refer to en.wikipedia.
2013-02-15 07:10 Centpacrr 1137×687× (891602 bytes) Add 5" with arrows to illustration showing height of superelevation.
2013-02-15 04:47 Centpacrr 1137×687× (630103 bytes) Railroad track spirit level in place indicating 5" of superelevation between the inside and outside rail of a curve along the [[Keystone Corridor]] near Narberth, PA. <small>1850's vintage track spirit level from the ''Cooper Collection of Americ...
Captions
Add a one-line explanation of what this file represents