Abstract
July 3—This small disturbance of comparatively short duration was marked by a sudden commencement in all three elements. The time of the commencement, taken from the trace of the Mitchell vertical‐intensity inductometer, was 10h32m25s (±3 seconds), G. M. T. At this time the horizontal intensity increased by 20 gammas in four minutes of time and small decreases were noted in declination and vertical intensity. Small but rapid fluctuations ensued until 13h after which normal conditions were resumed.
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