A Treatise on the Microscope: Forming the Article Under that Head in the Seventh Edition of the Encyclopaedia Britannica |
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Common terms and phrases
ABCD Achromatic Microscope achromatic object-glass adjustment advantage angle of aperture annexed figure aperture axis Canada balsam centre colour compound microscope concave lens condensed construction convex lens cornea croscope diameter diamond lens distance distinct vision ditto double convex doublet Dr Goring Dr Wollaston examined eye-glass eye-piece fibres fluid focal length garnet glass lens globules grooved sphere illuminating lens improvement inch focus instrument ject light magnifying power method of illuminating micro Micrographia micrometer Microscopic Cabinet microscopic objects milled head minute mirror monochromatic object mn oblique observer obtained opaque objects optical oxyhydrogen pencil perfect perforation Phil piece placed plane side plano-convex lenses plate polarised prism Pritchard rays reflecting microscope refractive power rhomb scales screw seen Selligues shown in fig single lens single microscope Sir David Brewster slider sliding solar microscope specula speculum spherical aberration structure surface teeth telescope thickness tion tourmaline Trans transparent objects triangular tube Vorticella