. The microscope and its revelations. and fine adjustments. •2. Concentric rotation of the stage 3. Mechanical stage. I. .Mechanical I I. 1. Coarse and fine adjustments. 2. Mechanical stage. .>. .Mechanical III. 1. Coarse and line adjustments. 2. Plain stage. .i. .Mechanical IV. I. Sul. stage lit I iny (in. suit sta^e). / l| ., -\T < lass \ . 1. Single adjust men! (coars • line). _. Plain stage. \Vilh or without sub stage fitting (no sub-stage).Tins classification applies also to portable microscopes. The recent microscopes of the A
. The microscope and its revelations. and fine adjustments. •2. Concentric rotation of the stage 3. Mechanical stage. I. .Mechanical I I. 1. Coarse and fine adjustments. 2. Mechanical stage. .>. .Mechanical III. 1. Coarse and line adjustments. 2. Plain stage. .i. .Mechanical IV. I. Sul. stage lit I iny (in. suit sta^e). / l| ., -\T < lass \ . 1. Single adjust men! (coars • line). _. Plain stage. \Vilh or without sub stage fitting (no sub-stage).Tins classification applies also to portable microscopes. The recent microscopes of the American makers are erised by the highest quality of \\orkmanship and abundant • theConl mental mode] is confessedly made t heir foiinda- EECENT AMERICAN MICROSCOPES 21 I tii in. In the last edition of this work it was shown that Americanopticians made their first-class microscopes with swin^iii sub-stages,and we then pointed out that these were not only without FIG. 169A 111. KID;. p2 212 TIIK IIJSToKY AND DEVELOPMENT OF THE MICROSCOPE Imt injurious to the best work to a good instrument. Inthe interval tin- swinging . lias been given up, even by ardent ;nlvMc;i1i>: l>ut ;i1 the same time in the majority ofcases tli-V have abandoned the sub-stage proper and adopted the( nitiiicnial condenser titling instead. In fact, the Americanopticians have chosen almost exclusively, as the basis of their standsot everv class, the microscope that has been so long in vogue onthe Cont incut of Kurope. It will sutlice to take examples of the unexceptionally beautifulwork of the two leading opticians of America—The Bauseh andLomb Optical Compam and The Spencer Lens Company. Anillustration of the best instrument, known as the Crand Model/ ofthe former of these opticians is given in fig. 170. It is designateda Continental Micro-cope. but is not a mere copy of the best workof Germany or France. The body-tube is large, and the
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
