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A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures (1848)

Quekett, John, 1815-1861 · London, H. Bailliere · leaf 50

An illustration from A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures, 1848, leaf 50 — andthe object being fixed upon the point g, orFig. ii. held in the forceps A, the instrument is … 16 PRACTICAL TREATISE ON placed in such a position, that the light from the sun, or brightcloud, being received upon the speculum, the rays are con-centrated upon it, and it becomes brightly illuminated,and is adjusted to the focus of the lens by turning thenut d; all loss of time in the screw…

Microscopy

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