![](https://coimages.sciencemuseumgroup.org.uk/497/534/large_thumbnail_smg00155557.jpg)
![](https://coimages.sciencemuseumgroup.org.uk/497/534/large_thumbnail_smg00155557.jpg)
![](https://coimages.sciencemuseumgroup.org.uk/497/536/large_thumbnail_smg00155559.jpg)
Frager's positive water meter, sectioned
![](https://coimages.sciencemuseumgroup.org.uk/497/562/large_thumbnail_smg00155603.jpg)
Magnetic inferential water meter
![](https://coimages.sciencemuseumgroup.org.uk/497/545/large_thumbnail_smg00155569.jpg)
Inferential water meter
![](https://coimages.sciencemuseumgroup.org.uk/497/547/large_thumbnail_smg00155571.jpg)
Half inch M.2 water meter, mechanism exposed
![](https://coimages.sciencemuseumgroup.org.uk/391/679/large_thumbnail_smg00155573.jpg)
Lacoste water meter
![](https://coimages.sciencemuseumgroup.org.uk/497/535/large_thumbnail_smg00155558.jpg)
"Star" disc water meter, sectioned
![](https://coimages.sciencemuseumgroup.org.uk/497/546/large_thumbnail_smg00155570.jpg)
Mark III water meter
![](https://coimages.sciencemuseumgroup.org.uk/497/544/large_thumbnail_smg00155568.jpg)
Water meter with feed hoses
1851
Frager's patent positive water meter
1878