Clinical lectures on the principles and practice of medicine . lf causedone to be made some yearsago, which, with its case,resembled 3 small pockettelescope. Dr. Gruby ofParis, however, has plannedthe most ingenious instru-ment of this kind, whichpossesses most of the prop-erties we have enumerated,and will be found very use-ful for those accustomed tomicroscopic is contained in a case,the size of an ordinarysnuff-box, and possesses allthe conveniences of thelarger instruments, withvarious lenses, a microm-eter, slips of glass, needle, knife, and forceps, in that small com-pass
Clinical lectures on the principles and practice of medicine . lf causedone to be made some yearsago, which, with its case,resembled 3 small pockettelescope. Dr. Gruby ofParis, however, has plannedthe most ingenious instru-ment of this kind, whichpossesses most of the prop-erties we have enumerated,and will be found very use-ful for those accustomed tomicroscopic is contained in a case,the size of an ordinarysnuff-box, and possesses allthe conveniences of thelarger instruments, withvarious lenses, a microm-eter, slips of glass, needle, knife, and forceps, in that small com-pass. Figures 47 and 48, representing the instrument, exactly one-half the real size, will givo an idea of this ingenious microscope,manufactured by the late M. Brunner of Paris. For a more minutedescription of it, I must refer you to the Monthly Journal of MedicalScience for December 1846. Equally commodious pocket microscopes,but on a somewhat different model, are now made by Nachet. Fig. 4*7. Grubys compound pocket microscope—exactly one-half the real Fig. 47. 80 EXAMINATION OF THE PATIENT. There is a general feeling among the public that the larger a micro-scope is, the more it must magnify; but I need not tell you this is very imposing mass of brass work and mechanical complexity is noguarantee that you will see objects better, or, what is of more consequence,become good observers. On the contrary, the more unwieldy the in-strument, the less disposed will you be to use it. Besides, the habitualemployment of artificial methods of moving about the object, as by thescrews of a movable stage, will prevent your acquiring that dexteroususe of your fingers and accuracy of manipulation which are at all timesso useful. Nothing, indeed, can be more amusing than to see a mantwisting his screws, pushing his heavy awkward stage about, andlaboriously wasting time to find a minute object which another can doin a moment, and without fatigue, by the simple use of his fingers.
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectmedicine, bookyear187
