Dring & Fage Customs And Excise Hydrometer

The purpose of a hydrometer is to determine the specific gravity of a liquid. From this it is often possible to determine the composition or strength of the liquid. The Sikes hydrometer was, for very many years, the standard means of determining the alcohol content of spirits and hence the duty payable.

In wooden box with brass instruments.

Please note there is some writing in the top of the box.