Hundreds of Natural Cycles Documented by the Foundation for the Study of Cycles

Post 1.

Cycles Research Institute
For the Interdisciplinary Study of Cycles
http://www.cyclesresearchinstitute.org
Index by Cycle Length
The following table of cycle period lengths

http://www.cyclesresearchinstitute.org/indexlength.html

is taken from the publication “Cycles Classic Library Collection” published by the Foundation for the Study of Cycles. The numbers after the cycle series name are page references to the “Cycles Classic Library Collection”. It is arranged in order by cycle length. An additional table in order by the name of the series having the cycles is also provided.

Some notes on the table are relevant. It was scanned and converted by OCR from a printed book and as such may contain some errors. Please report any errors that you find. The period lengths are sometimes stated as a whole number of years, which may mean that the cycle period is not known accurately or that the period was close to a whole number of years. In other cases periods such as 3.33 years are given which may mean about 3 and 1/3 years which is presumably more accurate than a whole number of years. There seems to be a tendency to use 1/2, 1/3 and 1/6 of years, perhaps because these are whole numbers of months. In that case the accuracy may be about 1 month. In other cases (most notably Dewey’s analysis) the periods are stated with more decimal palces and probably does truly reflect the accuracy of the results, e.g. 5.92 or 5.537 years.

LENGTHS GIVEN IN HOURS
1 hour and 4 minutes cycle eruption of Old Faithful geyser; 127
12.5-hour cycle tides; 80
12.75-hour cycle tides; 65
24-hour cycle the day; 80; 264
diurnal cycle earthquakes; 127
24-hour cycle light and dark on earth; 65
LENGTHS GIVEN IN DAYS
7-day cycle aftershock; 284
8-day cycle aftershock; 284
10-day cycle aftershock; 284
12-day cycle aftershock; 284
13.25-16.25-

day cycle stock prices; 740
14-day cycle aftershock; 284
14.75-day (2.1-week) cycle stock prices; 741-742
14.8-day (2.-11-week) cycle earthquakes; 127
14-28-day (2-4 week) cycle amorousness of women; 281; 283
29.5-day (4.21-week) cycle births of infants; 278; 281-283
29.6-day (4.23-week) cycle earthquakes; 127
34 market-day cycle sugar prices; 21-22
120.166-day (17.14-week) cycle stock prices; 467-496
387-day (55.29-week) cycle brightness of T Cephei; 122-123
433-day (61.86-week) cycle variations of latitude; 732
LENGTHS GIVEN IN WEEKS
2-week cycle insect swarms; 10
2-week cycle stock market; 10
17-week (3.88-month) cycle stock prices; 270; 402
17-week (3.88-month) cycle the sun; 402
17-week (3.88-month) cycle sunspots; 119; 232; 270
17.166-week (3.915-month) cycle stock prices; (Dow Jones Indus trial Averages); 467-496
17.166-week (3.915-month) cycle sunspots; 232-233; 492
LENGTHS GIVEN IN MONTHS
3-month (13.04-week) cycle textile plant sales; 40-44
3.937-month (17.1-week) cycle stock prices (industrial); 63
4-month (17.39-week) cycle electric potential of trees; 63
4-month (17.39-week) cycle stock prices; 467
4.05-month (17.63-week) cycle sales of Company G; 63
5.9-month (25.65-week) cycle stock prices (industrial); 63
6-month (26.09-week) cycle earthquakes; 127
6-month (26.09-week) cycle electric potential of trees; 63; 280; 309-311
6.33-month (27.52-week) cycle stock prices; 403
6.33-month (27.52-week) cycle stock prices (industrial); 521
6.37-month (27.69-week) cycle stock prices; 521
6.41-month (27.87-week) cycle stock prices; 403
6.41-month (27.87-week) cycle stock prices (industrial); 520
7.92-month (34.44-week) cycle sales of Company G; 63
8.8-month (38.26-week) cycle sales of Company G; 63
9-month (39.13-week) cycle bank debits; 63
9.18-month (39.91-week) cycle ton miles (Canadian Pacific Rail way); 41-43; 359-361; 372-377
9.2-month (40-week) cycle stock prices (industrial); 360
9.7-month (42.18-week) cycle breeding of sooty terns; 278; 286-287
11.9-month (51.74-week) cycle stock prices (industrial); 63
12-month (52.18-week) cycle earth around sun; 65
12-month (52.18-week) cycle earthquakes; 127
12-month (52.18-week) cycle spring flowers cause; 80
12-month (52.18-week) cycle temperature of air; 65; 732; 740
12-month (52.18-week) cycle ton miles (Canadian Pacific Rail way); 359
12.01-month (1.01-year) cycle pig iron; 20
12.01-month (1.01-year) cycle plagues; 20
12.36-month (1.03-year) cycle temperature; 734
13.3-month (1.11-year) cycle stock prices (industrial); 63
15.3-month (1.28-year) cycle stock prices; 465
17.8-month (1.48-year) cycle stock prices; 63
21-month (1.75-year) cycle pipe fittings; 47-49; 388-394
23-month (1.92-year) cycle stock prices; 465
23-month (1.92-year) cycle textile production; 19-20
23.6-month (1.94-year) cycle automobile factory sales; 63
23.7-month (1.98-year) cycle stock prices (industrial); 63
24-month cycle cotton production; 325
24-month cycle evening grosbeak; 279
24-month cycle rayon production; 380
24-month cycle sweet potato production; 382
24.2-month (2.02-year) cycle economic activity; 290
30-month (2.5-year) cycle pipe fittings; 47-49; 388-394
30.29-month (2.524-year) cycle lake levels; 137; 139
30.66-month (2.555-year) cycle lake levels; 137; 139
31.04-31.13-month (2.587-2.594-year) cycle lake levels; 137; 139
32.41-month (2.701-year) cycle lake levels; 137; 139
32.82-month (2.735-year) cycle wheat price index; 731; 734
33-month (2.75-year) cycle automobile factory sales; 360
33-month (2.75-year) cycle bond prices; 19
33-month (2.75-year) cycle building activity and construction (residential); 19; 313; 342; 360
33-month (2.75-year) cycle climate; 360-361
33-month (2.75-year) cycle consumer goods; 19
33-month (2.75-year) cycle copper prices; 360
33-month (2.75-year) cycle General Motors sales; 360
33-month (2.75-year) cycle pig iron prices; 360
33-month (2.75-year) cycle prices; 19; 360
33-month (2.75-year) cycle rayon production; 360; 380
33-month (2.75-year) cycle retail sales; 19
33-month (2.75-year) cycle sales of an industrial company; 360
33-month (2.75-year) cycle ton miles (Canadian Pacific Rail way); 359-361; 378-379
33-month (2.75-year) cycle wheat prices; 360
33.46-33.65-month (2.788-2.796-year) cycle lake levels; 137; 139
34.86-month (2.905-year) cycle lake levels; 137; 139
35.6-month (2.97-year) cycle stock prices; 63
LENGTHS GIVEN IN YEARS
3-year cycle automobile factory sales; 63
3-year cycle General Electric sales; 317
3-year cycle influenza; 20
3-year cycle pneumonia; 20
3-year cycle varves; 125
3-3.5-year cycle business activity; 740
3.006-year (36.072-month) cycle lake levels; 137; 139
3.02-year (36.2-month) cycle stock prices; 63
3.13-year (37.56-month) cycle lake levels; 137; 139
3.25-year (39-month) cycle commercial paper rates; 500
3.25-year (39-month) cycle lake levels; 137; 139
3.28-3.29-year (39.36-39.48-month) cycle lake levels; 137; 139
3.33-year (40-month) cycle commercial paper rates; 500
3.33-year (40-month) cycle economic time series (clearings; commodity prices; interest rates); 500
3.33- or 3.42-year (40- or 41-month) cycle economy; 16
3.34-year (40.08-month) cycle Like level;; 137; 139
3.39-year (40.7-month) cycle stock prices (industrial); 497
3.4 year (40.8-month) cycle pig iron production; 13-16
3.4 year (40.8-month) cycle variation in solar radiation; 16
3.4 year (40.8-month) cycle Westinghouse Electric and Manufacturing Co. sales and production; 17
3.42-year (41 month) cycle bank debits; 505
3.42-year (41 month) cycle commercial paper rates; 500
3.42-year (41 month) cycle commodities; 16
3.42-year (41 month) cycle failures; 588-597
3.42-year (41 month) cycle pig iron production; 13; 44; 48; 64
3.42-year (41 month) cycle pipe fittings; 47-49; 388; 394
3.42-year (41 month) cycle prices; 500
3.42-year (41 month) cycle production 16; 500
3.42-year (41 month) cycle sales; 16
3.42-year (41 month) cycle steel production; 16
3.42-year (41 month) cycle stock prices; 16
3.42-year (41 month) cycle stock prices (industrial); 402-403; 497-506
3.46-3.48 year (41.5-41.8-month) cycle lake levels; 137; 139
3.5-year (42-month) cycle business; 314; 395-400
3.5-year (42-month) cycle pig iron production 347
3.5-year (42-month) cycle rayon production; 380
3.54-year (42.48-month) cycle war; 638; 640
3.60-3.62-year (43.20-43.44-month) cycle lake levels; 137; 139
3.67-year (44-month) cycle pipe fittings; 47-49; 388-394
3.69-year (44.3-month) cycle pine grosbeak; 751
3.767-year (45.20-month) cycle weather; 761-762; 764
3.8154-year (45.78-month) cycle stock prices; 456
3.83-year (46-month) cycle stock prices; 402; 471; 456-466
3.91-3.92-year (46.92-47.04-month) cycle lake levels; 137; 139
4-year cycle cheese consumption; 272; 313; 344 34l
4-year cycle mice plagues; 10-11
4-year cycle pine grosbeak; 751
4-year cycle sunspots; alternate cycles reversed; 272
4.14-year (49.7-month) cycle lake levels; 137; 139
4.2-year (50.4-month) cycle love rings; 58
4.2-year (50.4-month) cycle weather; 58
4.222-year (50.664-month) cycle deaths in Massachusetts; 757
4.222-year (50.664-month) cycle temperature; 750-764
4.222-year (50.664-month) cycle tree rings (Arizona); 752; 757
4.222-year (50.664-month) cycle varves; 752
4.225-year (50.7-month) cycle pine grosbeak; 751
4.25-year (51-month) cycle dates of thawing and freezing of rives; 751
4.25-year (51-month) cycle river break-up; 752
4.33-year (52-month) cycle lake levels; 137; 139
4.37-year (52.44 month) cycle sales of Company G; 63
4.4-year (52.8 month) cycle stock prices (industrial); 63
4.4-year (52.8 month) cycle stock prices (railroad); 63
4.41 year (52.92-month) cycle advertising effectiveness; 63
4.41 year (52.92-month) cycle temperature; 63
4.41 year (52.92-month) cycle wheat prices; 63
4.418-year (53.016-month) cycle wear; 761-762
4.44-year (53.28-month) cycle pig iron price;; 63
4.50-year (54-month) cycle lake levels; 137; 139
4.77-year (57.24-month) cycle lake levels; 137-138
4.8-year (57.6-month) cycle sunspots; 270

Long live cycles : )

Bill
Author of Arnold’s Law
Mathematics of Bode’s/Arnold’s Law, spacing of planets around the sun.
Read Bode’s Law Explained:
http://cyclesresearchinstitute.org/astronomy/arnoldbode.pdf
Special Theory of Order: mechanism of our Solar Planetary System:
http://www.cyclesresearchinstitute.org/astronomy/arnold_theory_order.pdf

PG

Author: Leslie Carol Botha

Author, publisher, radio talk show host and internationally recognized expert on women's hormone cycles. Social/political activist on Gardasil the HPV vaccine for adolescent girls. Co-author of "Understanding Your Mood, Mind and Hormone Cycle." Honorary advisory board member for the Foundation for the Study of Cycles and member of the Society for Menstrual Cycle Research.