. The microscope and its revelations. to it; this selenite stage or object-carrier being laid upon the stage of themicroscope, the slide containing the object is placed upon it, and. byan ingenious modification contrived by Dr. Leeson. the ring intowhich the selenite plate is fitted being made movable, one plate maybe substituted for another, whilst rotation may be given to the ringby means of a tangent-screw fitted into the brass plate. Thevariety of tints given by a seleiiite film under polarised light is sogreatly increased by the interposition of a rotating film of mica thattwo selenites—r
. The microscope and its revelations. to it; this selenite stage or object-carrier being laid upon the stage of themicroscope, the slide containing the object is placed upon it, and. byan ingenious modification contrived by Dr. Leeson. the ring intowhich the selenite plate is fitted being made movable, one plate maybe substituted for another, whilst rotation may be given to the ringby means of a tangent-screw fitted into the brass plate. Thevariety of tints given by a seleiiite film under polarised light is sogreatly increased by the interposition of a rotating film of mica thattwo selenites—red and blue—with a mica film, are found to give theentire series of colours obtainable from any number of selenitefilms, either separately or in combination with each other. The compact apparatus made by Swift as a general sub-stage illuminator is useful and commendable,and is capable of adaptation to mostEnglish microscopes. It is shown in The special advantage of this con-denser lies in its having the polarising.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
