1851 Great Exhibition: Official Catalogue: Class X.: Charles Rein
From Graces Guide
929. REIN, CHARLES, 108 Strand—Inventor.
New instrument for aiding the hearing, which requires no spring, and is not observable; the length of the tube is 18 inches.
Various instruments of the same kind, which may be worn without being seen.
Acoustic chair, vases, bells, walking-sticks, telescopes, etc., adapted for various useful purposes.
Conical flexible whispering-tubes; domestic telegraph; ear-caps or reflectors; acoustic pulpit, and group of acoustic instruments.
Continual stream enema reservoir; several kinds of aperitive vases and enemas.
Ear springs of different constructions. Registered, self-acting lactatory. A variety of tubular ear specula and other instruments.
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