Abstract
The Magnetic Station of Teoloyucan, 36 km north of Mexico City, has worked without interruption, and R. O. Sandoval has observed the absolute values twice a month with magnetometer‐inductor No. 107 (C.I.W. type) and has tabulated all the data from the magnetograms of our Askania‐Werke variometers.The mean monthly values reduced to International Magnetic Standards are given in Table 1, as also the magnetic character of each month; moreover, Table 2 shows the perturbations registered during the year.
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