de Maupertuis' www-CV
A base line of 14.3 km was accurately measured on the ice-covered River Tornio and with use of that the length of the meridian degree was calculated by means of triangulation. The southernmost point of measurement was the tower of the Tornio Church and the northernmost point was the hill of Kittisvaara 4 km north of the village of Pello. A memorial was erected in 1956 on the hill.
When Maupertuis returned he reported that one meridian degree is in Lapland 57,437.9 toises. (The ancient French unit of length toise was 1.949 meters.) This result when compared to the value of 57,060 toises near Paris proved that the Earth is flattened near the poles just as the theory predicts. Gross errors were later pointed out in the measurements but the conclusions were correct. The king of France rewarded Celsius with an annual pension of 1,000 livres.
The results of the measurements were made public in Maupertuis's book "La Figure de la Terre" (Paris 1738). It was also published in English as "THE Figure of the Earth" (London 1738) and in Latin, Leipzig 1742. The academy correspondent, abbot Réginald Outhier published in 1744 in Paris an illustrated account of the journey "JOURNAL D’UN VOYAUGE AU NORD, En 1736. & 1737". Outhier's map (337 K)
Sources: The Facta Encyclopaedia (Finland), Encyclopaedia Britannica, Suomenmaa, The Finnish Biography Book, Helsinki University Library, Åsa Nordén: "Sällsamheter i Tornedalen" Kristianstad 1983.