. The microscope and its revelations. n-densing lens whose focal length is equal to the sum of distancesbetween the lens and the plate of glass, and between the latter andthe object. The question of illumination is a very important one, to whicirreat attention is to be devoted. As source of light the Auer,a triplex burner, adjustable in height, may lie recommended;- it is placed .-it a distance of one metre from the illuminator. The flame is surrounded by an iron r asbestos cylinder, with only the necessary aperture for illumination of the object. The source of light should be at exactly the s
. The microscope and its revelations. n-densing lens whose focal length is equal to the sum of distancesbetween the lens and the plate of glass, and between the latter andthe object. The question of illumination is a very important one, to whicirreat attention is to be devoted. As source of light the Auer,a triplex burner, adjustable in height, may lie recommended;- it is placed .-it a distance of one metre from the illuminator. The flame is surrounded by an iron r asbestos cylinder, with only the necessary aperture for illumination of the object. The source of light should be at exactly the same \\iththe lens, It, of the illuminator. On removing the eye- filr />/;/,• und Mechanik, 17, I, Reii lifi-t. SPECIAL MICROSCOPES 265 piece and looking through O c, it will generally be found that themicroscopical field is not evenly illuminated : the light should thenbe lowered or raised until perfectly uniform illumination isobtained. The beam of light received by the lens, b, is made to converge, and Oc.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
