(from a post by Darrin Vernier in astrofin Yahoo group)
The two Great Depressions of American history up to this point have been in 1873 and 1929.
Interestingly 56 years has been a favorite cycle period of authors such as Dewey and McMinn.
The half cycle of a major cycle can be interesting too and half of 56 is 28.
56 + 28 = 84
1929 + 84 = 2013
Note that all of these cycle lengths are multiples of 7 years and what I’m saying may be clear