. The Bell System technical journal . Fig. C. Distril)Utiiin of IllKr jianiclis in snft riiMur insulation as re-vealed by a transparent section. The section was cut in a microtome liy Hash-ing the rul)I)cr with licjuid air which hardened it just sufficiently to cut prop-erly. The specimen was photographed by ])olarizcd light and with sclcniteplates to secure contrast between the particles and the embedding rublier com-pound. Note agglomeration of the particles into large masses. The ideal con-dition of distribution would be attained when each individual iiarticle issurrounded by rubl)er. Magni
. The Bell System technical journal . Fig. C. Distril)Utiiin of IllKr jianiclis in snft riiMur insulation as re-vealed by a transparent section. The section was cut in a microtome liy Hash-ing the rul)I)cr with licjuid air which hardened it just sufficiently to cut prop-erly. The specimen was photographed by ])olarizcd light and with sclcniteplates to secure contrast between the particles and the embedding rublier com-pound. Note agglomeration of the particles into large masses. The ideal con-dition of distribution would be attained when each individual iiarticle issurrounded by rubl)er. MagnilKalinn 720 X,. Fig. D. Colloidal particles as seen through the ultra-microsccpc. (a) Polymerized particles in a phenolic resin solution. Taken with the cardioid ultra-microsco))C and the Lucas Ihotomicrographic canura. Instantaneous exposure was necessary because the particles were in constant motion. Magnification, 220 X.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
