Proper noun
Hennell
A surname.
In 1828, Hennell and the French chemist Georges-Simon Serullas independently discovered that sulphovinic acid could be decomposed into ethanol. citation On page 368, Hennell produces ethanol from "sulfovinic acid" ( ethyl hydrogen sulfate ). Source: Internet
On page 248, Hennell mentions that Faraday gave him some sulfuric acid in which coal gas had dissolved and that he (Hennell) found that it contained "sulphovinic acid" (ethyl hydrogen sulfate). Source: Internet