Fig. 67. Aranss Method of Mark-ing Objectives, on a Revolving Nose-P. ece. As seen in the figure, the equiva-lent focus of the objective is engravedon the diaphragm above the back lensand may be very readily seen in ro-ta I iug then ose-p iece. Th is is of greatadvantage and facilitates the… … Figs. 6S-69. The Tolles-Mayall Mechanical Stage (j Both these mechanical stages have the great advantage of large movement in bothdirections, so that a series may be studied with great certainty and facility, Both havescales and verniers, so that the position of any particular feature of a…
Microscopy
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