Inquiries respecting the anatomy of the eye / [Arthur Jacob].

  • Arthur Jacob
Date:
1823
Catalogue details

Licence: Public Domain Mark

Credit: Inquiries respecting the anatomy of the eye / [Arthur Jacob]. Source: Wellcome Collection.

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    shallow vessel of water, to the bottom of which a piece of wax has been secured. The operator should be provided with fine dissecting forceps, and needles in light handles; with one needle he should pin the sclerotic down to the wax, and with the other raise the lens and portion of vitreous hu¬ mour attached to it from the ciliary processes, and separate the ciliary ligament from the sclerotic. He may now expect to discover the membrana pa¬ pillaris, but its perfect transparency renders it com¬ pletely invisible; he may, however, ascertain its ex¬ istence, by taking a minute particle of the retina and dropping it into the centre of the pupil, where it remains suspended if this membrane exist. The preparation should now be taken up in a watch glass, and placed in a weak mixture of spirit and water, and a little powdered alum, raised on the point of a needle, dropped upon it. After a day or two, it maybe examined; and, if the membrane be present, it has become sufficiently opake to be visible, and may now be suspended in a bottle of very dilute spirit. The drawings which accompany the present me¬ moir, have been executed with great care and fide¬ lity by Mr. John Jacob, of Waterford; they are good specimens of his success in the delineation of subjects requiring much care and dexterity.
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