Diseases of the bladder, prostate gland, and urethra : including a practical view of urinary diseases deposits and calculi / by Frederick James Gant.

Gant Frederick James, 1825-1905.

Date:: 1884

Credit: Diseases of the bladder, prostate gland, and urethra : including a practical view of urinary diseases deposits and calculi / by Frederick James Gant. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

493/638 page 475

$(2) Clinical Microscope.—Beale's clinical pocket rmicroscope is a very simple, portable, and inexpensive i instrument. Object-glasses required for Clinical Examination.— iWliatever form of microscope be preferred, the object- -glasses, for magnifying the object to be examined, are tthe most essential requisite. The qualities of an object- < glass consist in its magnifying power and achromatic (character, by clearly defining the object, without any (encircHng play of colours. The powers most commonly 1 useful in medical practice are two—the quarter of an \inch focus, magnifying about 200 diameters, and the Anch, magnifying about 30 to 50 diameters. •Microscope Lamp.—For examining objects by artificial ] Ught at night, or otherwise in the absence of daylight, ; some kind of illuminating contrivance will be necessary. An ordinary French lamp, provided with a blue glass I chimney, may be used, or that recommended by Dr. [ Lionel Beale, a small paraffine lamp, with a round wick, : may be preferred. But in the absence of any such lamp, ; a short wax candle, giving a clear white light, steadied ' by a screen, supphes a ready contrivance which will : generally suffice. • «$