CHAPTER X.. Further Inquiry in Relation to the Reciprocal Action Between the

Further inquiry in relation to the reciprocal action between the earth and the counter-trade--Terrestrial magnetism, and what we know of it--Its elements, and their variations--Their connection with the variations of atmospheric condition--Magnetism acts through its connection with electricity--Character of the latter and its variations--Their connection with atmospheric conditions-- Electricity as well as magnetism in excess over this country-- Effects of it upon our climate--Closer consideration of the atmospheric phenomena--Their diurnal changes and connections compared with those of magnetism and electricity--Grouping of all the diurnal variations--Particular and separate examination of them--Classification of storms--Examination in detail of the several classes and the primary influence of the earth or counter-trade in relation to each 285