VIII. Records of the magnetic observations at the Kew Observatory. No. IV.—Analysis of the principal disturbances shown by the horizontal and vertical force magnetometers of the Kew Observatory from 1859 to 1864

Abstract

This paper exhibits an analysis of the principal disturbances recorded by the horizontal and vertical force self-recording magnetometers of the Kew Observatory in the years 1859 to 1864, showing the progressive diminution in the number and value of the disturbances from a maximum in 1859 to a minimum in 1863, being the first moiety of the “decennial period;" and showing also the distribution of the disturbances, increasing or diminishing the respective forces, in the several years, months, and hours.