. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 196 A. J. GOLDFORB utes produced 34 per cent zoned eggs. Fifteen seconds more centrifti- gation gave 52 per cent. Repetitive tests varied 0 to 8 per cent. CYCLICAL VISCOSITY, EGGS CENTRIFUGED IN SEA WATER In Experiment 7\ (Fig. 2), the first test was made 17 minutes after shedding. When centrifuged for 2 and 21/4 minutes, the eggs were insufficiently zoned. When centrifuged for 2]/> minutes, 42 per cent (of 165 eggs) were zoned to a carefully noted standard. When 2^0 hours old, one sample was tested for 2% minutes as be-
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 196 A. J. GOLDFORB utes produced 34 per cent zoned eggs. Fifteen seconds more centrifti- gation gave 52 per cent. Repetitive tests varied 0 to 8 per cent. CYCLICAL VISCOSITY, EGGS CENTRIFUGED IN SEA WATER In Experiment 7\ (Fig. 2), the first test was made 17 minutes after shedding. When centrifuged for 2 and 21/4 minutes, the eggs were insufficiently zoned. When centrifuged for 2]/> minutes, 42 per cent (of 165 eggs) were zoned to a carefully noted standard. When 2^0 hours old, one sample was tested for 2% minutes as be- fore. The eggs were not sufficiently zoned. The second sample, centri- (> r- to C V* e 4) 7 U 6 ""o •O. I 20 40 v 60 > 0 80 ^ 100 10 15 20 25 Hours 30 35 40 FIG. 3. Same conditions and symbols as in Fig. 2. during first 33 hours and decreased viscosity thereafter. Shows increased viscosity fuged 30 seconds longer, contained only 33 per cent zoned to standard. The estimated time necessary to produce the same percentage of eggs zoned to the same standard as in the initial test was 2' 55". When 5 hours old, 2 samples were again centrifuged, one for 3 minutes (to approximate the previous estimated 2' 55") and another 3' 25". The first contained only 27 per cent, the second 39 per rent /oiicd eggs. The latter approximates the initial 42 per cent. Hem c 55 seconds longer centrifuging was required at this age to pro- duce the same /conation as in the 14-hour old eggs. Similar double tests were made at successive ages to 33 hours. The. 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, Al
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
