![](http://www.alamy.com/thumbs/6/D72A3EE8-E64B-48BD-ADE1-94B9C46E5FCC/MFNP2R.jpg)
Roller Bridge or inclined plane for transferring vessels from one level of waterway to another. Inclined planes were a cheaper alternative to locks. Water power is being transferred from the waterwheel, R, through gearing to the windlass at H. From 'Architecture Hydraulique' Bernard Forest de Belidor, (Paris, 1737).
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Photo credit: © Photo12/Ann Ronan Picture Library / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 18th, century, civil, engineering, inland, scheme, transport, water