Controlling the airflow and thus temperature and humidity. You also see variants of these on greenhouses, kilns, flues and dryers.
Matthew
Matthew Ward
Historian and Broadcaster
@HistoryNeedsYou
HistoryNeedsYou.com
> On 7 Sep 2014, at 13:41, "Jones, Peter" <[log in to unmask]> wrote:
>
> Dear all, not I know museum based but educational and GEM is a font of all knowledge...I was walking part of Peddars Way and camped in an old brickyard. I found and recognised the Clay puddling pits with wheel but have no idea of these? We (the fellow walkers and myself) would love to know. Thanks
>
> Peter
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