NO: I PERIODS RELATED TO 273 MONTHS—ABBOT 17 
as real variations of the sun. Still her ribbon plot was so wide that it 
was found desirable to smooth the record. This she did by taking 
7-day overlapping means. The range of pulse remaining after smooth- 
ing was approximately from 60 to 70 pulses per minute. 
Scanning the smoothed pulse record, it appeared to present a re- 
curring period of 106 days. The range of that period seemed to show 
alternately maxima and minima. So a period of 212 days was sought 
for by tabulation. With five repetitions of the 212-day tabulation, 
their mean was as represented by the hne A in figure 7. It is easy 
to see that, though loaded with many irregularities, the line A is 
fairly indicative of an approximate sine curve, with a range of two 
pulses, as shown by the smooth line. 
Following the procedure of my weather-variation papers, the curve 
A was cleared successively of five periods, which are aliquot parts of 
212 days, respectively %4, 44, %, %, and 41 of 212 days. These are 
shown in the upper part of figure 7. The successive removals of them 
show the successive smoothing of curve A, in curves D, E, B, C, and 
F. There still remains, as shown in curve G, a period of = days, 
or 12% days, and doubtless others. But curve F is so smooth that little 
doubt remains that the smooth line upon curve F is the veritable period 
of 212 days, as relieved of superriders. This smooth line is almost 
exactly the same in form and amplitude as that drawn free-hand on 
curve A. It has a range of two pulses or about 3 percent of the aver- 
age pulse rate per minute. 
In the solar variation, a 7-month period is one of the stronger ones. 
Reduced to days, a 7-month period is %9x 22% years, which is 
22-75 X 305-2504 _ 9, 3.07 days. This, of course, to well within the 
probable error, is the same as Dr. Marshall’s 212 days. Hence I con- 
clude that Dr. Marshall’s physiological period and its exact submulti- 
ples are all aliquot parts of my master solar period of 273 months. 
Doubtless this relationship is not accidental, and physiologists will, I 
am sure, note it with interest. 
SUMMARY 
The author shows that weather, glaciation, dates of snow coverage 
in Japan, magnetism in the sun, variations of the ionosphere, and 
human pulse rates all present regular periods which are exact multi- 
ples or submultiples of the master period of 273 months in the varia- 
tion of the sun’s emission of radiation. 
