[Trade Catalogue] R. Desgrais. Fabrique d'Appareils acoustiques et microphoniques contre la Surdité. Ententrd c'est Vivre
Paris. Wraps. Fine. Unusual trade catalogue for horns and other equipment to aid the hard of hearing -- but no modern hearing aids. N.d., circa 1920. Oblong, 15.5 by 25 cm. Unpaginated, 13 leaves, two different paper stocks -- one light and newspaper thin, the other, glossy and thicker. With different equipment recommended based on the amount of hearing loss, and a questionnaire for the hearing impaired to evaluate for himself his level of loss.
(Inventory #: 005167)
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