The microscope; an introduction to microscopic methods and to histology (1899)
Gage, Simon Henry, 1851-1944 · Ithaca, N. Y., Comstock publishing company · leaf 75
he systems of the objective mustbrought closer together, i. e., the adjusting collar must be turned azi ayfrom the zero mark. (B) If the tube is shorter than the standard torwhich the objective is corrected, the effect is approximately the sam<diminishing the thickness of the cover-glass, and… … Object-b Object—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 will be seenby consulting the figure that in shortening the tube of the microscope the objectmust be removed farther from the…
Microscopy -- Technique
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