Gazogene

The gasogene (or gazogene or seltzogene) is a late Victorian device for producing carbonated water. It consists of two linked glass globes: the lower contained water or other drink to be made sparkling, the upper a mixture of tartaric acid and sodium bicarbonate that reacts to produce carbon dioxide. The produced gas pushes the liquid in the lower container up a tube and out of the device. The globes are surrounded by a wicker or wire protective mesh, as they have a tendency to explode.

The earliest occurrence of the word noted in the Oxford English Dictionary dates from 1853, quoting a reference in Practical Mechanic's Journal on "Gaillard and Dubois' 'Gazogene' or Aerated Water apparatus". A gasogene is mentioned as a residential fixture at 221B Baker Street in Arthur Conan Doyle's Sherlock Holmes story A Scandal in Bohemia: "With hardly a word spoken, but with a kindly eye, he waved me to an armchair, threw across his case of cigars, and indicated a spirit case and a gasogene in the corner." The device plays a key role in Bernard Shaw's 1905 comic play Passion, Poison, and Petrifaction, Or The Fatal Gazogene.

The word is also used in Douglas preston andf Lincoln Child's "Brimstone", published in 2005, on Page 106.

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