Parhelia in the Mediterranean—The Weather in Switzerland

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Scientific paper

THE parhelia of January 27, which Mr. Ch. H. Allen in Mentone describes, has also been observed at several places in Switzerland: for instance, at Glaris and at Basle. The phenomenon has here been more completely developed; the sun appeared surrounded by two lightly-coloured halos of 46° and 92° in diameter. Owing to the sun's low altitude, little more than the semi-circumference of them was visible. Each of these halos had on its summit a tangent arc, turning its convexity towards the sun, the arc on the greater circle shining, as usual, in brilliant colours. On the inner halo, in the same altitude with the sun, two mock suns of a reddish tint were seen; a third appeared at the summit of the same circle at the junction with the tangent arc. All circles turned their red side to the sun. That part of the sky was covered with faint cirrus. The spectacle lasted from 2 to 4 p.m. In the evening of the 27th and also of the 29th the common halo of 46° diameter was seen round the moon. Daring the night of the 30th to the 31st some snow fell (melted 2.8 mm. in the rain-gauge), the first in this year.

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