Beck, Conrad, 1864- · London, R. & J. Beck, Ltd. · leaf 77
uarter-plate), and the distance from the upper end ofthe standard microscope is such that, with the 30-mm. compen-sating eyepiece, it gives a circular picture of about 3 inches. Itis rigid, and Ught, and extremely convenient. When the micro-scope is adjusted with all the care required to obtain the… … SUNDEY APPARATUS 75
Microscopy
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