. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. 246 ANNUAL REPORT SMITHSONIAN INSTITUTION^ 1907. EXPLANATION OF THE FIGURES. Fig. 1. Section through pure or almost pure red. Swollen in water and examination with a Zeiss apochromat, N. A. ,0 2 mm. focus. Central white light, a the limiting zone, h first Zenker lamina, c second interval, d deeper lying laminae, with indefinite edges, e unlaminated zone. Fig. 2. Section through the blue, in the reproduction the deeper lying laminae are
. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. 246 ANNUAL REPORT SMITHSONIAN INSTITUTION^ 1907. EXPLANATION OF THE FIGURES. Fig. 1. Section through pure or almost pure red. Swollen in water and examination with a Zeiss apochromat, N. A. ,0 2 mm. focus. Central white light, a the limiting zone, h first Zenker lamina, c second interval, d deeper lying laminae, with indefinite edges, e unlaminated zone. Fig. 2. Section through the blue, in the reproduction the deeper lying laminae are badl}^ drawn. Conditions of examination as in fig. 1. Fig. 3. Section through the red in dry—• that is, in gelatine not swollen in water. Examination in Canada balsam. Central monochromatic light. Fig. 4. Section through greenish yellow. Same conditions as in fig. 3. The limiting zone and the grains in the individual laminae can not be seen. Fig. 5. Section through pure brilliant white. Swollen gelatine, a opaque mirror zone, h the fine stripes lying under the mirror zone. Fig. 6. Section through yellowish white, a mirror zone, c fine stripes, d laminae corre- sponding to the yellow. Figs. 7, 8, and 9. The action of intensifica- tion on the color. Fig. 7 shows the unintensified color, the stripes are too dark in the reproduction. Fig. 8. The same color intensified once in a sublimate bath. Fig. 9. After two intensifications. It will be observed how the scarcely visible grain in 11(, a b 7 becomes thick and dark in fig. 9. Fig. 10. Red. The thick- ness of the first laminae was reduced by friction, so that blue and green stripes appear. Fig. 11. Section through bright green, which by over- exposure and overdevelop- ment has become white; h mirror zone, c fine stripes belong to the white; the other laminas be- long to the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and app
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