Gabriel Mouton  Born: 1618 in Lyon, France Died: 28 September
1694 in Lyon, France  Gabriel Mouton obtained his doctorate in
theology in Lyon. However he spent much of his spare time
studying mathematics and astronomy. He took holy orders and
spent his whole career in St Paul's Church in Lyon where he was
appointed in 1646. Speziali writes in [1]:-  He spent his whole
life in his native city, fulfilling his clerical
responsibilities and untroubled by any extraordinary events.
During his leisure time he studied mathematics and astronomy and
rapidly acquired a certain renown in the city. Jean Picard, who
also was an abbé, held Mouton in high esteem and always visited
him when in Lyons to work on the determination of the city's
geographic position.  His most famous work Observationes
diametrorum solis et lunae apparentium published in 1670 studied
interpolation and a standard of measurement based on the
pendulum. Lalande wrote:-  This volume contains interesting
memoirs on interpolations and on the project of a