. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PHASE-SHIFTING A RHYTHM BY MAGNETISM 83 To learn exactly what effect the magnet might have, it was necessary first to learn the nature of the monthly variation of the initial controls. The presence and characteristics of such a rhythm in worms had previously been shown and char- acterized for morning hours. For the present study about 40% of the results were obtained, instead, in the afternoon. Determination of the relationship be-. FM NM FM FM NM FM FM NM FM FIGURE 3. A and A'. The variation in response to the and
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PHASE-SHIFTING A RHYTHM BY MAGNETISM 83 To learn exactly what effect the magnet might have, it was necessary first to learn the nature of the monthly variation of the initial controls. The presence and characteristics of such a rhythm in worms had previously been shown and char- acterized for morning hours. For the present study about 40% of the results were obtained, instead, in the afternoon. Determination of the relationship be-. FM NM FM FM NM FM FM NM FM FIGURE 3. A and A'. The variation in response to the and reversed horizontal vectors, respectively, in relation to moon phase during the first five minutes of field application (solid line), the second five minutes (dotted line) and the third five minutes (dashed line). B and B'. The corresponding relationships for the first three S-minute intervals follow- ing removal of the magnets. C and C'. The corresponding relationships for the fourth 5- minute interval (solid line) and the fifth one (dashed line) following experimental-field removal. tween phase of moon and means of the paths of the initial control-worms (Fig. 2) disclosed a mean monthly pattern of variation with a maximum right-turning near first quarter of the moon and maximum left-turning just prior to new moon. The mean response to the reversed field (Fig. 3A) was an immedi- ate gross reversal of phase of this normal monthly variation. Now, maximal right-turning occurred just prior to new moon. During the 15 minutes immedi- ately subsequent to the removal of the experimental field (Fig. 3B) the amplitude of this 180° phase-shifted monthly variation slightly increased and its form be- came somewhat altered. Only relatively minor changes in the mean monthly pattern then seem to have ensued through the 20- and 25-minute observation. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - c
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
