Material Classification, by Various 57169 [Subtitle: Recommended by the Railway Storekeepers' Association] [Link: http://track.smtpserver.email/20963/c?p=b3T46PrGkMwSAIx-ZN32BVoDPxLfY7U0puN6... ] [Files: 57169-0.txt; 57169-h.htm] Thanks to Richard Tonsing and the Online Distributed Proofreading Team at http://track.smtpserver.email/20963/c?p=wD8J0Qs2CGQhHaH8CPwpJsPrsHdYpvevcfoG... (This file was produced from images generously made available by The Internet Archive) David