all these observations were made by Michel PETIT (PTM) who transcribed only the positive observations

1 2 3 4 5 6 1952 34041 12.2   038-047     34064 12.2   063-070:     34092 12.5         34129 12.3       1953 34407 12.1   ___-411     34478 13.0         34531 13.0     xx 1954 34751 12.6   748-754:     34768 13.0     xx   34781 12.5   ___-784     34796 12.0         34829 12.7   ___-831     34841 12.4     xx   34858 12.5     xx   34893 12.9     xx

1 2 3 4 5 6 1955 35120 13.0     xx   35135 12.8     xx   35151 12.3     xx   35190 12.3   189-___ xx   35219 12.8     xx   35233 12.6   232-___     35254 13.0   253-___   1956 35442 13.0     xx   35537 13.0     xx 1957 35880 12.5     xx   35900 12.4   ___-903     35931 12.5     xx   35981 12.4     xx   36017 13.2     xx