Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 393
Outline of Pleurosigma qnadratiim, as seen under a power of 400diameters :— at A, B, D, are shown the directions of the lines seen undera power of 1,800, the illuminating rays falling obliquely (in each case)in a direction at right angles to the lines ; at E are shown two sets oflines, as seen when…
Microscopy · Biology
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