We believe the SAI'S leaders visited the Octagon Earthworks in 1911.
The SAI visitors likely made their way to Observatory Mound, a flat-topped mound capable of accommodating thirty people or more situated at the midpoint of the giant circle and marked by two low, parallel walls extending outside beyond the platform mound and aligned with the ceremonial walkway that connects the circle to the octagon. This was where the group likely gathered and sang together.
The wavefunctions of one pair are localized at the octagons 8R, whereas the wavefunctions of the other pair of bands are localized at the 8N octagons.
Two different octagons, surrounded by hexagons, appear at the junction between the tubes.
Heywood built his mansion, which has since been torn down, but the Octagon House remains a reminder of a limited time when the octagon style was popular in America.
The octagon style had a relatively short period in which it was popular, and even then it is estimated that only about 2,000 of this style of homes were built in the United States and Canada, and that about 500 of these homes remain.
This requirement leads to a regular octagon
that has sides of equal length and angles of equal measure, rather than any arbitrary octagon
Moreover, polygons with more sides than the hexagon, such as regular octagons
, do better, and polygons with fewer sides, such as squares, do worse.