serve to hold apair of forceps, or to pass a string through when viewingthe circulation of the blood in a frogs foot, the frogbeing previously fastened to a piece of wood or lead in acloth bag. In the centre of the stage is a black annulus,which can be removed when viewing opaque objects witha… … glasses and eye-pieces for giving a greater range ofmagnifying powers, as shown in the table given inpage 179. The above engraving shows two eye-pieces, the MICROSCOPIC OBJECTS. 177 shorter one producing about double the power of thelong eye-piece. (Remember, the shorter the eye-piecethe higher the…
Microscopy
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