The microscope; an introduction to microscopic methods and to histology (1917)
Gage, Simon Henry, 1851-1944 · [Ithaca, N.Y.] The Comstock Pub. Co. · leaf 159
Movable Scale§ 241. This form is a Huygenian ocular with a five millimeterscale divided into twenty one-fourth millimeter intervals. The pitch of the screwmoving the scale is \mm.; therefore onecomplete revolution ofthe drum moves thescale one-fourth of amillimeter, or one in-terval. The drum… … Fig. 91. Ocular Micrometer with MovableScale and Recording Drum. (From the Catalogue of the Spencer Lens Co.). The recording drum is divided into 100 equaldivisions. filar micrometer. To complete the measurement of an object notexactly included between any two lines of the scale, the drum needbe…
Microscopy · Microscopy -- Technique
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