. The microscope; an introduction to microscopic methods and to histology. Microscopes. no INTERPRETATION OF APPEARANCES CCh. IV placed upon this and covered in like manner. The third letter is placed upon the second thick cover and covered with an ordinary. Fig. 6s. The Microscopic Field completely and only partly Illuminated. A The field completely illuminated; a net micrometer is used as object. B The field is only partly illuminated; the same net micrometer is used as object, but not all of it appears in the partially lighted field. cover-glass. The letters should be as near together as po
. The microscope; an introduction to microscopic methods and to histology. Microscopes. no INTERPRETATION OF APPEARANCES CCh. IV placed upon this and covered in like manner. The third letter is placed upon the second thick cover and covered with an ordinary. Fig. 6s. The Microscopic Field completely and only partly Illuminated. A The field completely illuminated; a net micrometer is used as object. B The field is only partly illuminated; the same net micrometer is used as object, but not all of it appears in the partially lighted field. cover-glass. The letters should be as near together as possible, but not overlapping. Employ the same ocular and objective as above (§ i88). Lower the tube till the objective almost touches the top letter; then look into the microscope and slowly focus up. The lowest letter Fig. 66. Letters in Stairs to Determine Relative Position by Focus- ing Up and Down. will first appear and then, as it disappears, the middle one will appear and so on. Focus down, and the top letter will first appear, then the middle one, etc. The relative position of objects is determined exactly in this way in practical Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Gage, Simon Henry, 1851-1944. [Ithaca, N. Y. The Comstock publishing company
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