Gents Mag 1749 p.203
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Gentleman's Magazine 1749 p.203
gradually diminish'd, a tail, at the same time, as gradually extending from the Southermost parhelion B (which before had none) till both A's and B's tails appear'd of equal length: A while after a white cloud mov'd apparently into the place of the parhelion A, so that it disappear'd, but the clouds moving off, A recover'd its lustre again, and then also its tail, by degrees, extended to the same length as at first, whilst B's tail gradually decreas'd, till it again appear'd without one. All this time the rainbow colours of the two halos became less vivid, and turn'd whitish; then, touching the top of the exterior halo, there appear'd a broken one IK, deeply tinged with the colours of the rainbow, wch seemed to respect the zenith Z for its center; the interior limb whereof, nearest Z, was tinged with violet, the exterior with red; at this juncture, the radiated coronet, to whose base the imperfect halo I K seem'd concentric, disappeared, but the deep tincture of the imperfect halo partly fading, it appear'd again, tho' not with its former splendour. The lustre of the two parhelia was sometimes stronger, sometimes fainter; now tinged with rainbow colours, again quite lucid; as A's lustre diminish'd, B's increas'd; and as A's tail either decreas'd, or increas'd, B appear'd either with or without a tail. In short, the regular variations and changes made such a beautiful appearance that words cannot paint it. A little after 7, a black cloud veil'd the face of the real sun, when the mock sun A quickly disappear'd, and B as quickly redoubled its own lustre and length of tail, but presently grew so faint and weak, by the approach of a white cloud, as scarcely to be visible, the cloud being past, it recover'd a little; clouds again succeeding, the whole disappear'd. A little before 8 it was again clear round the sun, when the interior halo CGD again appear'd quite white, except some rays of a yellowish tincture at top, but the two parhelia, and the exterior halos were quite vanished. I am, Sir, Yours &c. JOHN DAVIS. Cumberland, May 4. |
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