Diseases of the nose and throat; a text-book for students and practitioners . Fig. 9.—Mackenzies Condenserfob Argand eyes; but in order to obtain the most direct return of the raysof light the perforation in the mirror should be placed directlyin front of one eye. In order to complete the reflecting apparatus, it is necessary 18 DISEASES OF THE NOSE AND THROAT. to have some form of handle or attachment. In this country,a head-band is usually employed (see Fig. 11), but some preferto attach the mirror to a heavy spectacle-frame, while others

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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherph, booksubjectnose