DEGREE MEASUREMENT EXPEDITION:
The measuring instruments
The measuring sites
The Maupertuis party arrived in Tornio in order to construct the needed
chain of triangular measurement sites in the archipelago just off Tornio,
in the Gulf of Bothnia. Camus, Outhier and Sommereux inspected the archipelago
between Tornio and Raahe only to find out that the islands were all
too low for the specific purpose.
The headmaster of Tornio school, Mr Wegelius suggested that the measurements
be made on the fells close to the river Tornionjoki instead. The work
was begun by finding the suitable angular points of the triangles. The
southernmost point was naturally the belfry of Tornio Church and the
Kittisvaara fell became the northernmost point. Other measurement points
were Kaakamavaara, Nivavaara, Horilankero, Aavasaksa, Huitaperi, Niemivaara
and Pullinki fells. In addition to this there were the measuring points
of the base line Luppio and Poiki-Torni by the Tornionjoki river. The
expedition climbed many other fells of the area, too, to inspect their
suitability as measuring points.
After the points had been found the angles between different points
and the angular height of each aiming device were defined.