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Structure of mechanism

Function This is a wooden base holding a tank stand (alcohol tank?), with cotton wicks which were set alight. A metal rod is located just above, attached at one of its ends. The other end, which is free, is in contact with the arm of a bent moving needle in front of a dial graduated from 1 to 90. The base also features a support with three other metal rods (copper, aluminium, iron, brass).


Examples of application The pyrometer is used to measure the linear dilation of solids in the presence of heat. It was used during practical courses by future teachers at the men’s and women’s teacher training colleges of Aurillac (Cantal), now the IUFM (University Teacher Training Institute).
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