Quarterly journal of microscopical science . r. Royston-Pigotts paper on Higli-PowerDefinition and its Difficulties; and the Visibility ofDiatomaceous Beading. Fi-. a. iQ. 1 and 2.—Longer and shorter black lines of interference according to theless or greater angle of intersection of ribbing forming Podurawaviuess. 3.—Delusive lines formed by beading imperfectly defined in diatoms andin scales, as in Figs. 6, 7, 8. 4 and 5.—Hexagon shadows developed by ill-defined spherules. 9, 10, 11, 12, and 13.—A variety of appearances shown by diatomsaccording to their treatment; the nature of the objectiv
Quarterly journal of microscopical science . r. Royston-Pigotts paper on Higli-PowerDefinition and its Difficulties; and the Visibility ofDiatomaceous Beading. Fi-. a. iQ. 1 and 2.—Longer and shorter black lines of interference according to theless or greater angle of intersection of ribbing forming Podurawaviuess. 3.—Delusive lines formed by beading imperfectly defined in diatoms andin scales, as in Figs. 6, 7, 8. 4 and 5.—Hexagon shadows developed by ill-defined spherules. 9, 10, 11, 12, and 13.—A variety of appearances shown by diatomsaccording to their treatment; the nature of the objectives and thedirection of the light. 14.—Section of beading of scales arranged in many cases in close contact. J 5.—Black shadows of intersecting superimposed beading. 16.—Their accepted though erroneous appearance, as in Podura curvicollis test scale. 17, 18, and 19.—Observed diffraction, causing broken lines when fineparallel lines intersect with a small space between the planes inwhich they lie. Jlc^:J^.. jUijston fijott. del* It; EainT MIC. JOURN., VOL. X., N. S., PLATE XI. IKCRSASE OF OF VESSELS AND OTHEK TISSUES. Fig I.
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherlondo, bookyear1870
