The microscope in theory and practice / translated from the German of Carl Naegeli and S. Schwendener.

Date:
1887
Catalogue details

Licence: Public Domain Mark

Credit: The microscope in theory and practice / translated from the German of Carl Naegeli and S. Schwendener. 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.

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    PART I.—continued. CHAP. PAGE X. THE OPTICAL POWER OF THE MICROSCOPE 90 — 101 1. —Defining and Penetrating Poweii accord- ing TO THE EARLIER AUTHORS 91, 92 2. —Importance of the Angle of Aper- ture 93— 97 3. —Fusion of the Interference and Dioptric Images 98, 99 4. —Ratio of Aperture and Focal Length 99—101 XI. DIFFRACTIONAL ACTION OF THE APERTURE OF THE LENSES 102, 103 XII. ILLUMINATION 103 — 115 1. —Illumination by Transmitted Light... 104—111 2. —Illumination by Reflected Light ... Ill—115 PART 11. THE MECHANICAL ARRANGEMENT OF THE MICROSCOPE. I. GENERAL RULES FOR THE CONSTRUCTION OF STANDS 116 — 121 n. THE STANDS OF MODERN OPTICIANS ... 122 — 125 PART III. TESTING THE MICROSCOPE. I. TESTING OF THE OPTICAL POWER IN GENERAL ... 126 — 149 1.—Absolute Power of Discrimination :— Images of AVire-gauze as Test-objects 127—132 Organic Test-objects 132—139 Nobert's Test-plate 139, 140 2.—Relative Power of Discrimination ... 140—147 3.—Defining Power 148, 149 II. TESTING THE SPHERICAL ABERRATION 149- -158 III. TESTING THE CHROMATIC ABERRATION 158- -167 IV. TESTING THE FLATNESS OF THE FIELD OF VIEW 168, 169 V. TESTING THE CENTERING 170, 171 VI. DETERMINATION OF THE ANGLE OF APERTURE ... 172- -177 VII. DETERMINATION OF THE MAGNIFYING POWER AND FOCAL LENGTH 178- -183 1.—Magnifying Power 178—181 2.—Focal Length 181—183 VIIL DETERMINATION OF THE CARDINAL POINTS 184- -188