Microscopic illustrations of few new, popular and diverting living objects with their natural history, &c. &c. : conjoined with accurate descriptions of the latest improvements in the new microscopes ... / by C.R. Goring and Andrew Pritchard.

  • Q55972295
Date:
1830
Catalogue details

Licence: Public Domain Mark

Credit: Microscopic illustrations of few new, popular and diverting living objects with their natural history, &c. &c. : conjoined with accurate descriptions of the latest improvements in the new microscopes ... / by C.R. Goring and Andrew Pritchard. Source: Wellcome Collection.

    103/114 page 87
    8th. MOUNTING FOR DISSECTIONS, &C. Dissections are generally performed on opaque subjects, though it may be sometimes necessary to dissect transpa- rent ones also. The erecting eye-piece must, of course, always be employed, by sliding it up and down in the body ; with various objectives the power may be made gradually to advance from a mere nothing up to the 1 -SOtli of an inch (which I conceive to be the utmost which can be used) and still allow sufficient space between the object and the ob- ject-glass for the anatomist to manage his implements, and to procure the necessary illumination. Mount the engiscope in the vertical position, and see that the bar is locked fast in its front leg, to give the utmost degree of stability ; place it on the tripod stool, before re- commended, with the front of the stage before you, and the pillar next to the window—(a diagonal position for yourself and the instrument relative to it, will be most con- venient, to allow the light to fall freely on your subject.) Use the single condenser, n, to furnish your light, if neces- sary ; it may be moved round the neck of the body, to suit your convenience. You may also employ the lengthening piece, 'i, if you please, which will allow you to fix the stage on the pivot and sliding socket, i, and give a lower position for it. If you use the latter, see that it is clamped very fast, that it may not give way with the weight of your hands. If you do not find it advisable to employ the false stage, fig. 22, which procures a separate rest for the little fingers, while the thumb and index finger operate, drop the piece, fig. 27, into the aperture of the stage, and fix it by turning it one- quarter round. Then place the piece of cork or wood, &c.
    No text description is available for this image
    No text description is available for this image
    No text description is available for this image