The library of Eratosthenes

Site description

Eratosthenes experiment : Put a staff to the sun, measure its shadow when the sun is at its highest point, deduce the angle of the solar rays compared with the vertical staff, then exchange your results with another class under another latitude. Then, a few geometrical drawings and a rule of three give you the length of earth’s meridian.

Eratosthenes Network

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The experiment of Eratosthenes

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This Web site is under construction. You will find the totality of the articles on the Web site in English or French . All the articles are not translated yet. Many translations need to be improved. Thank you for your patience and your comprehension.

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janvier/january

16 Beloeil
22 Cañada de Gómez
28 L’Albenc
29 Cañada de Gómez

février/february

05 Lafrançaise
06 Lafrançaise
14 Cañada de Gómez
20 Beloeil
25 Cañada de Gómez

mars/march

15 Lafrançaise
16 Hồ Chí Minh City - Lafrançaise
18 Beloeil - Cañada de Gómez - Port Lincoln
19 Leadville - Pozzallo
20 Arras - Bar Harbor - Cañada de Gómez - Lafrançaise - Madison - Nutley - Warangal
21 Adelaide - Duluth
22 Leadville - Toszek
23 Montreal - Pozzallo
24 Duluth - Lafrançaise - Vastseliina
25 Jakarta
26 Xiamen

avril/april

03 Lafrançaise
07 Lafrançaise
14 Lafrançaise
16 Xewkija
18 Lafrançaise
20 Lafrançaise
21 Lafrançaise - Cluj Napoca
22 Beloeil - Cluj Napoca
23 Cluj Napoca
26 Cañada de Gómez

mai/may

01 Elizabeth
09 Arras 2005 2008 - Lafrançaise 2005 2006
11 Arras - Cañada de Gómez - Lafrançaise - Xewkija
13 Arras
16 Beloeil - Lafrançaise 2006 2008
19 Lafrançaise - Pujato
20 Beloeil - Lafrançaise 2005 2008
21 Cluj Napoca
23 Arras - Lafrançaise
25 Arras - Cañada de Gómez - Lafrançaise - Theux
30 Cluj Napoca - Lafrançaise 2005 2008
31 Lafrançaise

juin/june

02 Lafrançaise
03 Lafrançaise
04 Cañada de Gómez - Lafrançaise
06 Cañada de Gómez
08 Cañada de Gómez - Lafrançaise
09 Allahabad - Arras - Cluj Napoca 2006 2008 - Lafrançaise 2005 2006 2008 - Pleiku - Pujato - Xewkija
10 Cluj Napoca - Lafrançaise 2005 2008
12 Lafrançaise
13 Lafrançaise
15 Cañada de Gómez - Lafrançaise - Xewkija
16 Adelaide - Allahabad - Arras - Beloeil - Cluj Napoca - Lafrançaise 2006 2008
17 Lafrançaise
18 Lafrançaise
19 Lafrançaise
20 Arras - Cañada de Gómez
21 Lafrançaise - Xewkija

juillet/july

21 Cañada de Gómez
26 Meerut - Cluj Napoca - Pleiku

août/august

21 Cañada de Gómez
25 Arras
29 Panama city

septembre/september

17 Lafrançaise - Stanford
18 Lafrançaise
19 Cañada de Gómez - Lafrançaise - New York
20 Lafrançaise - Wharton
21 Adelaide - Cañada de Gómez - Chillicothe - Lafrançaise - Warren - Yuba City
23 Auckland - Greenfield Park - Pachuca
24 Arras - Baungon - Gulf Breeze - Lafrançaise - Maricopa - Virginia Beach
25 Lafrançaise - New York - Wrocław
26 Placerville
28 Arras - Lafrançaise - Naples

octobre/october

10 Lafrançaise
21 Cañada de Gómez
24 Cañada de Gómez

novembre/november

09 Lafrançaise - Palma de Mallorca
10 Cañada de Gómez
16 Cañada de Gómez - Lafrançaise
28 Beloeil
29 Cañada de Gómez
30 Arras - Lafrançaise

décembre/december

01 Palma de Mallorca
12 Cañada de Gómez
14 Barranha - Lafrançaise
20 Arras
21 Arras - Lafrançaise

Lucia Gutu ’s editorial : WHY A PROJECT ?

WHY A PROJECT ?



The most recent articles


The most recent articles


Delhi

Tuesday 7 October 2008 by perbosc
New Delhi INDIA Rukmini Devi Public School 28.38 N 77.12 E 22 September2008 Metal Rod , gnomon : 19.7 cm shadow : 10.7 cm angle : 28.5° We are grade 8 students from Rukmini Devi Public School, located in the capital city-Delhi of India (Latitude: 28.38° N and Longitude: 77.12° (...)
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Pujato

Sunday 5 October 2008 by perbosc
Aquí le los detalles de dos mediciones realizadas el 22 de septiembre en Pujato (Argentina) con alumnos de la Escuela Primaria Nº 1345 "Nuestra Señora del Carmen" y tres fotos de los alumnos trabajando y midiendo. 11:45 pm (hora local) 14:45 (hora universal) sombra hacia el sur, ángulo de (...)
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Beloeil

Sunday 28 September 2008 by perbosc
Beloeil Canada Ecole le Tournesol (72°48’ W - 45°35’ N) date : 22/09/2008 gnomon : 15cm shadow : 16,5cm angle : 47°43’=47,72° http://tournesol.csp.qc.ca/Sites_classes/gisele/index.htm Chitré Panamá Escuela Hipólito Pérez Tello (80°25’ W - 07°58’ N) date : 22/09/2008 angle : 08°20’=8,33° (...)
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Panamá Chitré

Saturday 27 September 2008 by perbosc
Ciudad de Panamá 79°31’ W 08°00’ N PROYECTO ERATÓSTENES 2008 Registro Solar y Medida de la Sombra Escuela Hipólito Pérez Tello Chitré (80°25’ W - 07°58’ N ) – Panamá Fecha: Lunes, 22 de septiembre de 2008 Profesora: Verónica Castro Participantes 4to grado (9 – 10 años) 5to grado (10 – 11 años) (...)
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Cluj Napoca

Friday 26 September 2008 by perbosc
CLUJ NAPOCA ROMANIA latitude 46°46’ Gnomon : 100cm Diaporama Cluj-Napoca in the french article (22-23 september 2008) http://perbosc.eratosnoon.free.fr/e... 23 .09.2008 Gnomon : 100cm Angle : 47 10’ = 47,1667 Hour : 13h 15 min Shadow : 107,5 cm 22.09.2008 Gnomon : 100cm Angle : 46 (...)
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Gorakhpur

Friday 26 September 2008 by perbosc
Date : 09/09/2008 Gnomon : 98cm Shadow : 40cm Angle : 22°
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Meerut

Friday 26 September 2008 by perbosc
Meerut UP India 77°42’ E 29°00’ N Date : 22/09/2008 Angle : 28°30’
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Xewkija

Friday 26 September 2008 by perbosc
Xewkija MALTA latitude: 36° 02′ N longitude: 14° 15′ E date : 22/09/2008 gnomon : 100cm shadow : 73cm angle = 36° Distance lafrancaise xewkija 900km circumference : 900 x 360 / ( 44-36) = 900 x360 / 8 = 40500 km Distance cluj-napoca xewkija 1196km circumference : 1196 x 360 / ( 46,42-36) (...)
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Caluire

Friday 26 September 2008 by perbosc
Caluire , Collège Charles Sénard, France 04°51’ E 45°48’ N date : 22/09/2008 gnomon : 100cm shadow : 102cm angle : 45°30’
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Lafrançaise

Friday 26 September 2008 by perbosc
Date : 22/09/2008 Solar noon 1:48 pm France Gnomon : 100cm Shadow : 96.5cm Angle : 44° Date : 23/09/2008 Solar noon 1:48 pm France Gnomon : 100cm Shadow : 97.5cm Angle : 44°30’
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