Chronometrie
Henri Wehrli
473 - 1925 series A 759 points 2nd prize
868 - 1926 series A 772 points 2nd prize
4903 - 1928 series A 752 points 2nd prize
4908 - 1928 series A 699 points 3rd prize
4906 - 1929 750 points 2nd prize series B
Niton results at the Observatory by year1924 - 475, 868, 869, 8701925 - 473, [Niton received a Mention honorable for average 673.6 points] 1926 - 474, 868, 869 1927 - 4908 1928 - 4903, 4908 [699] 1929 - 4906 [750 points] |
Results by points
772 - 868
759 - 473
752 - 4903 [1928] 750 - 4906 [1929]
732 - 474
699 - 4908 [1928]
684 - 475
683 - 869
629 - 870
613 - 868
Calculations
Daily mean deviation=m
Mean deviation by position=p
Error compensation=c
Rate resumption=r
Old formula before 1909:
(0.75-m) * 400 / 3 + (2.5-p) * 40 + (0.20-c) * 350 + (5.0-r) * 6
Maximum 300 points
New formula after 1909:
(0.50-m) * 600 + (2.0-p) * 150 + (0.150-c) * 2000 + (2.5-r) * 40
Maximum 1000 points
Watches which successfully passed the tests were issued a Bulletin de Marche, certifying the results obtained. Watches which scored more than 2/3 of the available points were published by the Société des Arts until 1927, then by the Publications de l'Observatoire de Genève until 1968.