ABSTRACT
More accurate determinations from a greater mass of observations have emphasised this agreement, hinting at an intimate connection between sun-spots and terrestrial magnetism. The periodicity of solar phenomena is not confined to the spots, but is equally conspicuous in the facule and prominences, and one obvious step in the tentative solution of the problem is to regard all these manifestations as due to a regular variation of the solar radiation. His result, giving a distance of 93,000,000Much work of a very exhaustive character has been done in the endeavour to determine what miles, was received with great confidence and honoured by the bestowal of the Gold Medal of the Royal Astronomical Society. Sporer, whose name is generally given to this 'law of zones', was working at Anclam in Pomerania, and independently discovered the variation of rotation with latitude about two years later than Carrington.
