DescriptionHumphrey pump, King George V Pumping Station - geograph.org.uk - 883475.jpg
English: Humphrey pump, King George V Pumping Station The only other examples are at Cobdogla in Australia and at least one is workable.
These are large producer gas driven engines with the water acting as a piston. Amazingly enough these beasts actually worked.
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== {{int:filedesc}} == {{Information |description={{en|1=Humphrey pump, King George V Pumping Station The only other examples are at Cobdogla in Australia and at least one is workable.
These are large producer gas driven engines with the water acting as
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