. The microscope and its revelations. FIG. 44-2. -Triceratium favus: A, wide view ; B, front view. in regular rows; while the variety in the size and arrangement ofthese particles shows that they are correlated with the vital pro-cesses of the organisms, and aftbrd characters for the discriminationof the species. The nature of these granules, their size, and themode in which they are arranged have from the earlier days of micro-scopy rendered diatoms of special value as test-objects. Thisappearance has led to the use, in speaking of diatoms, of the incorrectterms transverse, longitudinal, or •
. The microscope and its revelations. FIG. 44-2. -Triceratium favus: A, wide view ; B, front view. in regular rows; while the variety in the size and arrangement ofthese particles shows that they are correlated with the vital pro-cesses of the organisms, and aftbrd characters for the discriminationof the species. The nature of these granules, their size, and themode in which they are arranged have from the earlier days of micro-scopy rendered diatoms of special value as test-objects. Thisappearance has led to the use, in speaking of diatoms, of the incorrectterms transverse, longitudinal, or • oblique strife, these being in truth simply the intervals which separatethe boundaries of the beads, apertures, ortheir equivalents, whatever they may ulti-t mately prove to be; and this is clearly seenwhen they are observed with objectives ofsufficient numerical aperture and propor-tional power. Pleurosigma angulatum isone of the most commonly employed testobjects, and at the same time one of the mostreliable, its remarkable cons
Size: 1920px × 1301px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
