. The microscope and its revelations. bly under 51. in cost. Becks British Students microscope is of this class, as is also the Star microscope by the same makers. The former has a firmly madetripod, as fig. 187, representing this instrument, shows. It has aspiral rack and pinion coarse adjustment, a fine-adjustment, a draw-tube with mm. scale, and a focussing sub-stage which swings out whennot in use. The presentEditor can speak highly ofthis instrument for elementaryclass work, and with goodworkmanship its price is ex-ceedingly low. The Star microscope is also a very re-markable instrument,
. The microscope and its revelations. bly under 51. in cost. Becks British Students microscope is of this class, as is also the Star microscope by the same makers. The former has a firmly madetripod, as fig. 187, representing this instrument, shows. It has aspiral rack and pinion coarse adjustment, a fine-adjustment, a draw-tube with mm. scale, and a focussing sub-stage which swings out whennot in use. The presentEditor can speak highly ofthis instrument for elementaryclass work, and with goodworkmanship its price is ex-ceedingly low. The Star microscope is also a very re-markable instrument, suffi-ciently so to justify us indeparting from a rule topoint out that with two eye-pieces, two objectives—a^-inch and a ^-inch—and aniris diaphragm, the whole,placed in a cabinet, is sold forU. 15s. We come now to micro-scopes of the fourth class. A small, compact, andthoroughly useful microscope,specially adapted for medicalstudents and BiologicalSchools, is made by Swift andSon, and known as their New Histological and Physio-. FIG. 186.—Rosss educational microscope(1898). logical Microscope. In its simplest form it is shown in fig. stand is a firm tripod, the optical tube slides in a cloth-linedfitting, the fine adjustment may be the differential screw actuatedby a large milled head, and capable of work with at least a ^th-inchobjective. It is beautifully swung, and is firm in any stage is large, and has the horseshoe opening. There areseveral grades of this instrument, involving more or less complexityand apparatus; but it was designed to meet, and we believe doesmeet, the needs of students who want a strong, practical, and well-equipped instrument at a very moderate price. Another instrument of this class deserving the highest commen-dation, and offering the student much more for the outlay involvedthan we could have thought possible twenty years ago, is The 234 THE HISTORY AND DEVELOPMENT OF THE MICKOSCOPE Fram microx-opr of Mi->srs. Watson
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
