. The microscope and its revelations. FIG. 243. L anrooiv. FIG. 244.—Wutsims oil-immersion condenser. pletely resolved (fig. b); by using the condenser with the collarcorrection these striae were resolved by means of the enlargedaplanatic cone it produced, as shown in c. Another advantage of the correction collar is that it enables theworker to determine most delicately the size of the illuminatingcone, and so to record it that it can be with facility exactly resumedat any time (Journ. K. Micro. Soc. 1895, pt. ii. p. 2:->l-2). One of the most valuable condensers introduced by any makerlatel
. The microscope and its revelations. FIG. 243. L anrooiv. FIG. 244.—Wutsims oil-immersion condenser. pletely resolved (fig. b); by using the condenser with the collarcorrection these striae were resolved by means of the enlargedaplanatic cone it produced, as shown in c. Another advantage of the correction collar is that it enables theworker to determine most delicately the size of the illuminatingcone, and so to record it that it can be with facility exactly resumedat any time (Journ. K. Micro. Soc. 1895, pt. ii. p. 2:->l-2). One of the most valuable condensers introduced by any makerlately is an oil-immersion one by Messrs. Watson and Sons. It hasspecial claims upon the attention of those who work with high 304 ACCESSORY APPARATUS power>. for we know of no similar instrument that yields so large a• solid cone- of illumination. The construction is an unusual one,the corrections for both spherical and chromatic aberrations beingeffected bv means f a cemented triple back lens, as is shown in theillustrati
Size: 1437px × 1739px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
