. The microscope and its revelations. movements; and the sub-stage has rack-and-piiiion movements andrectangular sector centring, while all the apparatus provided withthe largest instrument can be employed with it. We have usedthis instrument for delicate and critical work for twenty years, andthere is no falling off in its quality ; and, when packed with theadditional apparatus required, the case is 12 x 7 x 3 inches. Swift and Son have arranged their Histological microscope(fig. 196) as a portable instrument, to which from its peculiar con-struction it readily lends itself, and must be place
. The microscope and its revelations. movements; and the sub-stage has rack-and-piiiion movements andrectangular sector centring, while all the apparatus provided withthe largest instrument can be employed with it. We have usedthis instrument for delicate and critical work for twenty years, andthere is no falling off in its quality ; and, when packed with theadditional apparatus required, the case is 12 x 7 x 3 inches. Swift and Son have arranged their Histological microscope(fig. 196) as a portable instrument, to which from its peculiar con-struction it readily lends itself, and must be placed in the thirdclass of portable microscopes. Mr. Rousselet has designed an admirable little instrument ofportable form but of the sixth class. It is binocular. The tripodfolds; the stage is plain, with a sliding ledge. The condenserfocusses by means of a spiral tube, within which an inner tubeslides, carrying stops, diaphragms, &c. The mirror is jointed so as tobe used above the stage, and, as its focus is only 1-jj inch, can be. FIG. 197.—Bakers diagnostic travellingmicroscope (189(5). 246 THE HISTORY AND DEVELOPMENT 01- THE MICROSCOPE used as a side reflector. It is also arranged so that eye-pieceswith large field-glasses may be employed. It packs in a box1<H x ~)i x 3i inches, and weighs 6 pounds complete.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
