. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 120 R. B. FORWARD, JR., K. \Y. HORCH. AND T. H. WATERMAN polarization pattern. A compan'smi between the NF response and that WP condition most closely simulating the natural pattern should therefore be instruc- tive. The sky polarization in the zenith and all along the vertical great circle passing through the sun, , the sun's vertical, is perpendicular to the solar bear- ing. Consequently the 90° WP condition of the six used would no doubt most closely resemble the natural skv pattern. In the latter, however, the degree
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 120 R. B. FORWARD, JR., K. \Y. HORCH. AND T. H. WATERMAN polarization pattern. A compan'smi between the NF response and that WP condition most closely simulating the natural pattern should therefore be instruc- tive. The sky polarization in the zenith and all along the vertical great circle passing through the sun, , the sun's vertical, is perpendicular to the solar bear- ing. Consequently the 90° WP condition of the six used would no doubt most closely resemble the natural skv pattern. In the latter, however, the degree of polarization, maximum about 90° from the sun, varies for blue sky from 50-90% depending on the earth's albedo, the turbidity of the atmosphere and the sun's zenith distance (Sekera, 1957). Near the surface, if the water is relatively calm as in our experimental vessel, this polarization as 270 240 120°. 240 120° 210° 150° 180° Comparison of Zcnarchoptcrus' orientation relative to North under natural Humiliation and with different c-vector directions imposed by a polarizer; (A.) natural Humiliation without polarizer (NF condition), n = 96; (B.) with polarization plane at 90" sun's bearing (parallel to natural polarization in the sun's vertical), n = 53; (C.) with- r runs for five of the six specific c-vcctor directions (WP at 0°, 30°, 60°, 120°, 150°). (Fig. 6B) is excluded here. See text for discussion, n = 295; Eighteen Sectors and significant directons as in Figure Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Labora
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