Talk:Eratosthenes

From Wikipedia, the free encyclopedia
Jump to: navigation, search

Pronunciation of the name (stress placement)[edit]

The article says:

(Greek Ἐρατοσθένης, pronounced er-ə-TOS-thə-neez

This seems inconsistent. The Greek stress here is on the penult syllable, but the English stress is on the antepenult. Which is correct?

It is an English article, about a notable person so it is wholly appropriate to include a suitable English pronunciation scheme. People, who speak English say his name all the time, wrongly. I sought out this sight to exclusively determine the pronunciation of his name in English so I could correspond. So what is with the mystery Greek letters in the pronunciation part? I have no idea what the Greek letters mean in terms of phonemes. I don't think one should have to learn Greek to pronounce a famous man's name in English. — Preceding unsigned comment added by 24.89.225.234 (talk) 11:11, 28 August 2016 (UTC)

Berber Origines[edit]

Eratosthenes was a berber, there is berber tribes in Eypte and Libya and he have not been came with greeks, he was born in Libya, so he is not greek, he is berber. Why all people stole from us our scientists. — Preceding unsigned comment added by Berber027 (talkcontribs) 15:58, 31 March 2014 (UTC)

Is there oral history among the Berber about this fellow or his discoveries? Jplvnv~enwikisource (talk) 14:21, 12 April 2016 (UTC)

Where was he born?[edit]

I am so confused about where he was born.

As I understand it, he was from Syrene, which was a small town near Elephantine. This is Aswan Egypt now.

This makes sense to me, because it is the right distance due south of Alexandria, and in the right country at the time.

I think that everyone is confusing Cyrene Libya with Syrene Egypt.

-- Jonathan

Do you have some evidence, or is this just a hunch? There is a preposterously long list of sources cited in the article (and a good few beyond these) that say the Greek colony in what is now Libya is where he was from. Of course they could all be wrong, but without some fairly impressive reliable sources refuting this position, we will have to go on believing them.—Jerome Kohl (talk) 17:44, 31 August 2015 (UTC)

Music theory[edit]

Music theory is mentioned in the initial summary of his achievements, but no example is given in the body of the text. Jplvnv~enwikisource (talk) 14:17, 12 April 2016 (UTC)

On the size of the earth[edit]

Excellent article on Eratosthenes. I love the layout and the structure. I would however add my hapenny on the context of the size of the earth. A more thorough explanation can be found here... [1]


The main contention is over the length of Egypt as 5000 stade, syene to Alexandria being 5000 stade and 1/50th earth. This is actually a much deeper confusion over the metrology of the time, and is almost said tongue in cheek, where you can have your cake and eat it. The british : roman foot was in the ratio 35:36. The greek : roman foot was in the ratio 24:25. The Total length of Egypt was 7 degrees upper + lower. Using 1/50th Earth or 7.2 degrees gives the alternative 36:35 ratio. This is a different unit of measure than conventional egyptian.


The stade could be 300 royal cubits or 400 common cubits, but these come in multiple lengths depending on the geodesy module being used. [Note Herodotus stating the common was 3 finger short of the royal of 28 fingers (ie 24:25)] Herodotus gives the length of Lower Egypt as 6 degrees or 1/60th earth as 60 schoene of 60 stade of 600 feet or 400 common cubit. The Egyptians have the shen ring representing, all that was ruled under the path of the sun, constructed from coiled rope with a diameter bar at base.

Coiled rope = 100... Path of the sun = 1 day... Diameter of 'ruled' Earth = 100 days march.

At 1 passus / second of 60"...

24hour x 60min x 60sec x 60" x 100 days = 518,400,000 thumb inches.

With Pi as 25/8 to go with the base 60 system and as typified by Vitruvius (See Vitruvian Man for the importance of 25/8).

The Earth becomes 1,620,000,000 inches and 7 degrees is thus 31,500,000 = 5000 x 300 x 21" (5000 stade)


Thus we get:

1,555,200,000" Herodotus 1/60th Earth or 6 degrees (Ratio 864 - Geodetic Greek)

1,575,000,000" Eratasthenes 1/50th Earth or 7.2 degrees (Ratio 875 - Anglo Sumerian)

1,620,000,000" Egyptian Shen Ring. Length of Egypt 7 degrees (100 Atur). Length of lower Egypt 6 degrees. ACos 6/7 = 31 degree latitude boundary (Ratio 900 - Romano Egyptian).

There is no error in the size of the earth. It was known. All of these versions of the earths elliptical circumference (North/South length) are the same size using different modules. What changes, is the value of Pi used, and if the module refers to base, polar, equatorial, 2d mean or 3d mean.

Using 576 base : 577 polar : 577.33 3D Mean : 577.5 2D Mean : 578 equatorial

250,000,000 x 864/275 x 2 = 1570909090.9 Base Circle

1570909090.9 * 577.5/576 = 1,575,000,000" 2D Mean

Pi = 6/5th Phi^2 = 6/5th (Phi + 1) & Phi = 89/55 Fibonacci Series & Phi + 1 = 144/55

True Ellipticity = 601/600 x (6/5 Phi^2)/pi = 594.52559 polar : 596.52559 equatorial = 1/298.2627953 [2] — Preceding unsigned comment added by Michael saunders (talkcontribs) 21:35, 1 August 2016 (UTC)

Working with 600 and generating the Phi proportion is much easier than trying to create a Pi proportion and a 594.53559 module. Especially when they give the same circumference. — Preceding unsigned comment added by Michael saunders (talkcontribs) 21:40, 1 August 2016 (UTC)


The 252,000 stade Strabo Earth presents us with three issues:

7.2/360 x 252,000 = 5040 stade for the length of Egypt.

7.0/360 x 252,000 = 4900 stade for the length of Egypt.

6.0/360 x 252,000 = 4200 stade for the length of Egypt.

However, 1,555,200,000 / 252,000 / 300 gives us a cubit of 144/7 Greek Geodetic inches or 7 cubit to 12 feet.


All of these measures give various cubits of 21", 20.57" and 20.16" Greek Geodetic and all of which originate from the Remen Cubit area. The diagonal of a 20 unit square is 28.28427 and 28.28427 : 28 is 99%. Thus dividing the hypotenuse by 28 scales the cubits into 1% increments. 21" @ 100% (Major cubit) ~ 20.79 (Nile cubit) @ 99% ~ 20.58" @ 98% (144/7 Mapping cubit) ~ 20.37" @ 97% (Remen diagonal cubit) ~ 20.16" @ 96% (28 finger Minor cubit) You can use 21 finger and 30 finger diagonal to complete the 20:21:29 system Sumerian half with 20" cubits.

96% of 900 = 864.

96% of 600 = 576.


The rabbit hole goes much deeper. How far down do you want to go ?

Michael saunders (talk) 21:41, 1 August 2016 (UTC)

  1. ^ https://en.wikipedia.org/wiki/User:Michael_saunders
  2. ^ https://en.wikipedia.org/wiki/World_Geodetic_System