Dr. Britten's Home Battery

Speaks for itself.

The snippet is from the Countess of Caithness' book, Old Truths In A New Light (1876). EHB and the Countess had a long association -- the Countess shows up as a 'friend' of the Two Worlds Publishing Company, established by EHB and William in Manchester in the 1880s, in a vanity book the press did in the 1890s (below).