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Description: Metal ammoniaphone, for voice cultivation, in carton, invented by Dr. Carter Moffat, by the Medical Battery Co. Ltd, 205 Regent Street, London, England, 1871-1900. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: ammoniaphones Temporal: 1871-1900 Source: Science Museum Creator: Medical Battery Co. Ltd (maker) Identifier: A175918 Go to resource More Like this...
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