Gutta percha, its discovery, history, and manifold uses.

Date:
1851
Catalogue details

Licence: Public Domain Mark

Credit: Gutta percha, its discovery, history, and manifold uses. Source: Wellcome Collection.

    44/50 page 42
    CONVEYANCE OE SOTJNB. 3i'i;iS' made of it, from Miss Martineaii’s favourite pattern to tlie little cornet that clings unaided to the ear.” It is found i that those patterns answer best “ which have a direct communication with the ear, and do not depend upon vibration for their efficiency.” The distance, again, to which Grutta Percha tubing will transmit sound, is truly am^azing. The ticking of a watch has been heard by its means at a distance of 150 yards ! In offices and manufactories it is employed for speaking pipes, and is found to convey messages distinctly to any required distance, undisturbed by the sound of machinery. The domestic telegraph, or as somebody has named it “Telekoupha- non,” threatens to supersede the use of bells in large houses. The mouth-piece is in the parlour, the ear-piece in the kitchen. A whistle is fitted into the former, by gently blowing into which the attention of the servant is attracted. She thereupon applies Eig. 57, The Medical Man’s Midnight Eiiend.
    No text description is available for this image
    No text description is available for this image
    No text description is available for this image