Turner, H. H. (Herbert Hall), 1861-1930 · London, E. Arnold · leaf 210
1878 1882 7f:8h iSqo … Thk upiEK curve is /\ EACH CASE THE Si.\sr(>r CirK\E, IHE i.oWEu THE \ane Clk\ e.The ukeak in i832 in the Vane Cuk\E is due to the omissihn hi e\idi ntlv ACCIUEN lAL TURNS Fl^iiM THAT DATE. Plate XV. SCHWABE AND THE SUN-SPOT PERIOD 171 and the latter like a pearly halo of light extendingto many…
Astronomy
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