Something in the Air: Dr Carter Moffat's Ammoniaphone and the Victorian Science of Singing by Dickson, D

“…Aggressively (not to say unscrupulously) advertised, the Ammoniaphone was marketed to vocalists, clergymen, public speakers, choirmasters, schoolmasters, parliamentarians, and enthusiastic amateurs of these vocations, with claims that it would conserve and preserve the voice, expand its range upwards and downwards, and lend it an otherwise unobtainable purity, beauty and richness. …”