| Title: | Locking; being an elementary treatise on the mechanisms in interlocking lever machines by which the movements of the levers are restricted to certain predetermined ways, rendering it impossible to operate conflicting switches and signals on railways. |
| Author: | Lavarack, Frederick Charles, 1883- |
| Note: | F. C. Lavarack, 1907 |
| Link: | page images at HathiTrust |
| No stable link: | This is an uncurated book entry from our extended bookshelves, readable online now but without a stable link here. You should not bookmark this page, but you can request that we add this book to our curated collection, which has stable links. |
| Subject: | Railroads -- Signaling -- Interlocking systems |
| Other copies: | Look for editions of this book at your library, or elsewhere. |
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