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 150
veryuseful in rendering very delicatemarkings more distinct. The size ofthe illuminated spot will dependupon that of the aperture employed,and also upon the relative distancesof the mirror from the object, andof the diaphragm from the mirror. Erector,—Those microscopes sup-plied with a draw-tube,… … 110 PRACTICAL TREATISE ON THE MICROSCOPE. it consists of a piece of brass tube, three inches in length, andfive-eighths of an inch in diameter, as seen in fig. 65 ; into theopposite ends of which are screwed twoplanoconvex lenses a b, having their convexsurfaces towards the eye-piece situated inthe…
Microscopy
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