. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 300 OSCAR W. RICHARDS. organisms. Since the amount of sunlight for any given month was different in each year, as is shown in Fig. 2a, an accurate comparison can only be made by first removing the amount of the division rate cycle that corresponds to the amount of sunlight for each time and then comparing the residues. This is the pro- cedure that was used in the original analysis of the data, except that this time we use the recorded amount of sunshine for each month instead of a generalized statistically determined cycle t
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 300 OSCAR W. RICHARDS. organisms. Since the amount of sunlight for any given month was different in each year, as is shown in Fig. 2a, an accurate comparison can only be made by first removing the amount of the division rate cycle that corresponds to the amount of sunlight for each time and then comparing the residues. This is the pro- cedure that was used in the original analysis of the data, except that this time we use the recorded amount of sunshine for each month instead of a generalized statistically determined cycle to eliminate the observed cyclic variation in the division rates which have been corrected for the secular trend, Fig. 2b. (This figure is identical with that of Fig. 2d of the original ) After the sunlight cycles, Fig. 2a, are removed from the division rate. FIG. 2. a, the amount of sunlight, b, the division rate corrected for sec- ular trend (Cf. Fig. 2d, Richards and Dawson3). c, division rate residues after minimiznig secular trend and variation associated with sunlight. o, Paramccium. 9, Blepharisma. A, Histrio. A, deviations associated with a change of water source. •, deviations associated with removal to Woods Hole or Cambridge. +, deviations associated with temporary change of technician during the absence of Dawson. data, Fig. 2b, there is left a residual amount of variation which is plotted as deviations from the superimposed mean division rate for each organism, in Fig. 2c. II. The residual curves may now be directly compared, as the dis- turbing effect of trend has been eliminated. If the amount of solar radiation determines the vearlv cycle of seasonal variation. 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 Labor
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