ms of the objective must bebrought closer together, i. e., the adjusting collar must be turned awayfrom the zero mark. (B) If the tube is shorter than the standard forwhich the objective is corrected, the effect is approximately the same asdiminishing the thickness of the cover-glass, and the… … Objective Object-b Objecl-a Fig. 57.—Figure to show that in lengthening the tube of the microscope the ob-ject must be brought nearer the principal focus or center of the lens. It zvill be seenby consulting the figure that in shortening the tube of the microscope the objectmust be removed farther…
Microscopy
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