. The microscope and its revelations. ntally by means of the small screw w,and is fastened by means of the milled head, m. By the pinion n itmay be displaced over 90°, and as great an inclination can be takenin a plane perpendicular to this by the supporting metal frames bymeans of the pinion p. In this way every desired inclination of theobject to the knife can be readily secured. Fig. 393 presents the same object-holder, but instead of thecylinder a simple pair of jaws with the screw /// to secure objects ofevery A-ariety. A. cylinder-holder as in fig. 393 can be placed inthese jaAvs from wh
. The microscope and its revelations. ntally by means of the small screw w,and is fastened by means of the milled head, m. By the pinion n itmay be displaced over 90°, and as great an inclination can be takenin a plane perpendicular to this by the supporting metal frames bymeans of the pinion p. In this way every desired inclination of theobject to the knife can be readily secured. Fig. 393 presents the same object-holder, but instead of thecylinder a simple pair of jaws with the screw /// to secure objects ofevery A-ariety. A. cylinder-holder as in fig. 393 can be placed inthese jaAvs from which the benefits of the Neapolitan holder can besecured. But fig. 396 shows a still greater improvement which can beapplied to both object-holders, viz. perpendicular displacement />//means of a co/j //<///» governing the height of the mass fromwhich the sections are to be cut. The elevator in fig. 393 is supported on one side by the prism P,and 011 the other by tin- rod C: these are joined by the bridge/... FIG. 394.—Object-holder movable about two horizontal axes at right angles to each other. to which a cogged bar is fastened, into Avhich a pinion catches, Avhichis moved by the lever V, allowing a perpendicular displacement ot Hieobject of 12 mm. At 0 is the millimetre scale on which the perpen-dicular displacement can be read off by means of the index x. An object-holder movable about two horizontal axes situatedperpendicularly to each other is seen in fig. 394. These positionsare fixed by the milled heads />. 1>; may be intro-duced. This object-holder has a perpendicular displacement con-trolled by a screw. The part, K. which supports the chief axis of thejaws, is fitted on to the triangular prism 8/. the louer part of which isfurnished Avitli hinges ; on the hinge the screw V moves, which at itsupper end lies close to K, and is sustained in this position by thesteel plate g, so tha
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
