ICki >S( V )PE . WD A< I ESS( A7/:.s 29 micrometer. The micrometer may be removable, or it nay be permanently inconnection with the ocular, and arranged with spring and screw, by which itmay be moved back and forth across the field. (See Ch. IV.) \ 49. Spectral or Spectroscopic Ocular.—(See… … Fig. 38. Projection Oculars with sectionremoved to shozo the construction. Below areshown the upper ends with graduated circle toindicate the amount of rotation found necessaryto focus the diaphragm on the screen. No. 2,No. 4. The numbers indicate the amount theocular magnifies the image formed by…
Microscopy
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