US ON TOE NUMERICAL RELATIONS OF GRAVITY AND MAGNETISM. 



I. The daily magnetic variations, though subject to great disturbances at different hours, 

 show an average approximation to the differences of the gravitation-tidal currents. 



II. Marked indications of an accelerating force are discoverable in the magnetic fluc- 

 tuations, especially during the hours when the sun is above the horizon. 



III. There arc lunar-monthly barometric and magnetic tides, which may be explained 

 by differences of weight or momentum * occasioned by the combined influences of solar 

 and lunar attraction and terrestrial rotation. 



IV. The solar-diurnal variations of magnetism between noon and midnight (.00138), 

 are nearly identical in amount with the variations of weight produced by solar attraction 

 at the same hours (.00134). 



V. The magnetic variations at intermediate hours between noon and midnight, indicate 

 the influence of an accelerating force like that of gravity, modified by fluctuations of tem- 

 perature and by atmospheric or aethereal currents. 



VI. Some of the magnetic influences appear to be transmitted instantaneously, through 

 the rapid pulsations of the kinetic aether, — others gradually, through the comparatively 

 sluggish vibrations of the air. 



VII. The comparative barometric disturbances of the sun and moon, exhibit an ap- 

 proximate mean proportionality between their comparative differential-tidal and magnetic 

 disturbances. 



VIII. The theoretical gravitation-variation of magnetism (Prop. IV) is slightly less, 

 while the theoretical barometric-variation (Prop. VII) is slightly greater than the cor- 

 responding observed variation. The excess in one case exactly counterbalances the defi- 

 ciency in the other, the sum of the theoretical being precisely equal to the sum of the 

 observed variations. 



IX. The total daily magnetic variations, like the barometric, can be resolved into a 

 variety of special tides, which may be severally explained by well-known constant or 

 variable current-producing and weight-disturbing forces. 



X. The phenomena of magnetic storms indicate the existence of controlling laws analo- 

 gous to those which regulate the normal fluctuations. 



I propose briefly to substantiate these several propositions by a reference to the data on 

 which they are based. 



I. 



The mere announcement of any new numerical relations between the effects of two 

 great natural forces, like the first discovery of the inverse ratios of gravity and magnetism 

 to the square of the distance, is curious and interesting, even if it should lead to no 



" ] believe there ean be no weight without Home degree of momentum. See Proc. A. I'. 8., vol. ix, p. 357. 



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