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 198
in; butif it is necessary to immerse the object in a fluid, or to cover itwith glass or mica, an aberration will arise from these circum-stances which will disturb the previous correction, and, con-sequently, deteriorate the definition: and this effect will bemore obvious with the increase of the… … Fig. 110. where G G G G is the refracting medium, or a piece of glasscovering the object O and O P, the axis of the pencil, perpen-dicular to * the flat surfaces; O T a ray near the axis; andO T the extreme ray of the pencil incident on the undersurface of the glass: then TK T R will be the…
Microscopy
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