. The microscope and its revelations. ls(l- Sv ed Wales microscope (1881 and 1883). tightening of the screw, il can be tinnly fixed either horizontally, vertically, or at any inclination. The coarse adjustment is made .1 smooth working rack: the line adjustment is Swifts patent on ].. 17L> (lig. I.,:.). ,-md the attachable mechanical stage of firm can be readily added (a> in fig. |so). lmt in the best and LEITZS ENGLISH FOEM OF MICEOSCOPE 227 most complete form of the instrument a large mechanical stage isfitted, and sub-stage apparatus supplied. Leitz, of Wetzlar, provides a very useful
. The microscope and its revelations. ls(l- Sv ed Wales microscope (1881 and 1883). tightening of the screw, il can be tinnly fixed either horizontally, vertically, or at any inclination. The coarse adjustment is made .1 smooth working rack: the line adjustment is Swifts patent on ].. 17L> (lig. I.,:.). ,-md the attachable mechanical stage of firm can be readily added (a> in fig. |so). lmt in the best and LEITZS ENGLISH FOEM OF MICEOSCOPE 227 most complete form of the instrument a large mechanical stage isfitted, and sub-stage apparatus supplied. Leitz, of Wetzlar, provides a very useful instrument of the same. FIG. 181.—Leitzs IA stand (1898). 228 TILE HISTORY AND DEVELOPMENT OF THE MICROSCOPE class, li has a tripod base on the English model, and is a thoroughlysteady Lnstrumenl : it has rack and pinion movement to the coarseadjustment, and snl> stage; the draw-tube has a mm. scale, andafineadjustment oft in- usual Continental type, and all the latest adaptationsIm- sub stage illumination. The instrument in its simplest form isremarkably low priced, and the more important apparatus can be;,dded to il as required. It is illustrated in fig. 181. Becks third-class microscope is shown in fig. 182. It has a goodtripod foot with a single pillar. The Jackson model is used, buta peculiar line adjustment is employed, the lever being placed belowthe stage, the position of the screw being immediately behind thepillar which supports the limb, and where it is easy of access. Thebody is not affected by vibration when it is touched. The lever isof the second order, and it draws down the body limb and
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
