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- From: jfb@draco.macsch.com (John Baskette)
- Subject: Re: The Great Pyramid of Giza
- Message-ID: <1992Nov23.204349.4092@draco.macsch.com>
- Sender: jfb@draco.macsch.com (John Baskette)
- Organization: MacNeal-Schwendler Corp.
- Date: Mon, 23 Nov 92 20:43:49 GMT
- Lines: 56
-
- In article <1992Nov21.091202.14495@netcom.com> bosak@netcom.com (Jon Bosak) writes:
-
- >John Baskette (in an otherwise excellent summary of the facts
- >regarding pyramid measurements):
- >
- >JB> The pi ratio in the pyramid is derived from the ratio of the
- >JB> pyramid baseline divided by the height. The average baseline
- >JB> is 9,068.8. Divide this by the height (5776 +- 7 inches) and you
- >JB> get 1.5701. This value times two is 3.1402. A better approximation
- >JB> of pi is obtained using the angle of the slope of the faces of the
- >JB> pyramid. The angle for the north slope according to Petrie is
- >JB> 51 deg. 50 min. 40 sec. +- 1 min. 5 sec. The same ratios in a
- >JB> pyramid with this angle yield a value of 3.1427+-0.002.
- >JB>
- >JB> Petrie believed this feature was accidental. The Egyptians, he
- >JB> said, chose to build the pyramid using a sloping angle that
- >JB> was 11 at the base and 7 at the height. 11/7 is 1.5714. Times
- >JB> that by two and you get 3.1429 which is just about exactly
- >JB> the angle of the sloping stones.
- >
- >I don't get the impression that Petrie believed this relationship
- >based on pi was accidental at all. In _Pyramids and Temples of Gizeh_
- >he says:
- >
- > For the whole form the pi proportion (height is the radius of a
- > circle = circumference of Pyramid) has been very generally
- > accepted of late years, and is a relation strongly confirmed by
- > the presence of the numbers 7 and 22 in the number of cubits in
- > height and base respectively; 7:22 being one of the best known
- > approximations to pi. With these numbers (or some slight
- > fractional correction on the 22) the designer adopted 7 of a
- > length of 20 double cubits for the height; and 22 of this length
- > for the half-circuit. The profile used for the work being thus
- > 14 rise on 11 base.
- >
- >If you know some other place where Petrie explicitly recanted this
- >theory, I would like to hear of it. As far as I know, he found the
- >explanation based on pi to be among the most likely ones. It is true
- >that the value of 22/7 for pi (or 11/14 for pi/4) is traditionally
- >attributed to Archimedes, but it seems highly unlikely that this value
- >had not been discovered previously by the Egyptians, from whom the
- >Greeks directly inherited several standards of weight and length.
-
- I think that Jon is correct about Petrie's thinking and that my statement
- about "accidental" is not correct and is based on my misreading of the
- text. Note that my explanation of the construction profile which was an
- attempt to simplify what Petrie said is not essentially different.
-
- I referenced a copy of _Pyramids and Temples of Gizeh_ when presenting
- data to refute the claims about the base circuits encoding the days
- in a year idea and other data. Note also that the facts do show that
- the pi value used, even if it was intentionally incorporated into the
- design of the Pyramid by the ancient Egyptians, is not the extremely
- accurate value unmatched until modern times as claimed by Pyrmidologists.
-
- John
-