The top of the bob wall of the engine house at Great Work Mine
Introduction
The photograph on this page of The top of the bob wall of the engine house at Great Work Mine by Rod Allday as part of the Geograph project.
The Geograph project started in 2005 with the aim of publishing, organising and preserving representative images for every square kilometre of Great Britain, Ireland and the Isle of Man.
There are currently over 7.5m images from over 14,400 individuals and you can help contribute to the project by visiting https://www.geograph.org.uk
![](https://s0.geograph.org.uk/geophotos/02/66/32/2663257_81a7dd35.jpg)
Image: © Rod Allday Taken: 21 Oct 2011
This wall supported the reciprocating beam (known in Cornish mining as a bob) which transmitted the reciprocating motion of the piston to the pump rods in the adjacent shaft.
Image Location
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![Marker](https://streetguide.co.uk/includes/images/marker-icon-2x.png)