1750
 Latitude   Longitude   Anomaly
      70      20  -0.01000000
      70      30     0.110000
      65      10     0.130000
      65      20   -0.0700000
      65      30    -0.120000
      60       0    0.0700000
      60      10    0.0700000
      60      20     0.220000
      60      30     0.170000
      55       0     0.370000
      55      10     0.410000
      55      20     0.610000
      55      30     0.510000
      50       0     0.400000
      50      10     0.860000
      50      20     0.540000
      50      30    0.0600000
      45       0     0.420000
      45      10     0.960000
      45      20     0.340000
      45      30     0.270000
      40       0   -0.0900000
      40      10     0.290000
      40      20     0.450000
      40      30     0.260000