The microscope; an introduction to microscopic methods and to histology (1899)
Gage, Simon Henry, 1851-1944 · Ithaca, N. Y., Comstock publishing company · leaf 27
inted page. Hold the eye about two centimeters from the upper sur-face of the magnifier, then alternately raise and lower the magnifieruntil a clear image may be seen. (This mutual arrangement of micro-scope and object so that a clear image may be seen, is called focusing).When a clear image is… … Fig. 16. Diagram of the simple microscope show-ing the course of the rays and all the images, andthat the eye forms an integral part of it. A1 B\ The object within the principal focus. A3B\ The virtual image on the same side of the lensas the object. It is indicated with dotted lines, as ithas no…
Microscopy -- Technique
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