wn, and that this thickness be indi-cated in some way on the preparation. \ 338. Cover-Glass Measures, Testers or Gauges.—For the purpose ofmeasuring cover-glasses there are two very excellent pieces of apparatus.The micrometer calipers (Fig. 195) used chiefly in the mechanic arts, are con-venient… … Fig. 196. Zeiss Cover-Glass31 ea surer. With this theknife edge jaws are opened bymeans of a lever and the coverinserted. The thickness maythen be read off on the face asthe pointer indicates the thick-ness in hundredths millimeteriu the outer circle and in thous-andths inch on the inner circle-…
Microscopy
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