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From the first to the fifteenth of January the sky was generally covered with cloud; the mean temperature was 42.2°. No snow had been recorded up to this time. During the night of the sixteenth a change took place; and the mean reading of the thermometer from that day to the end of the month was 30.4°.

Pulverulent hail was recorded on the 17th and 22nd. Imperfectly crystallized snow, with sleet, on the 21st and 26th, at temperatures varying little from the freezing point; on the last named occasion snow fell during the night to the depth of nearly two inches, the density of which was about one-tenth that of water. The first perfect crystals, respecting which I have the following note, were seen as follows:

Figs. 2, The snow

January 30th, 9 a.m. "Sky obscured by dense and rather low cumulo-stratus cloud; hoarfrost on the grass; light snow falling, chiefly composed of fig. 1. 3, and others of the same forms, variously combined, not uncommon. was not sufficient to cover the ground."

The mean temperature of the month of February, at Warrington, was 28.8°; at Greenwich it was 29.3°, which is the lowest yet recorded there for this month, in a register extending back to the year 1814.

The frost which commenced on the 16th of January continued until the 3rd of February, and the weather was then broken for two or three days. February 6th, 9 a.m. "The ground white with frozen rain, which on examination is found to consist of transparent spherules of ice, resembling minute hailstones. This whiteness is confined to those situations where the raindrops have been dispersed on falling, as on the grass, and under the branches of certain trees: the hard walks and flags are covered with sheets of ice.

At noon the sky became gradually obscured by dense cloud, from which fell first powdery hail, and then the stars fig. 4, many of them perfect, and quarter of an inch across. Under the lens there were found to be snow crystals covered with the same peculiar spherules of granular bail, which I saw this morning. The amount of covering varied considerably; some of the stars being rendered almost spherical, while many shewed sufficient evidence of the crystal within. The snow fell thickly, but only for a minute or two.

February 8th, 9 a.m. Snow during the night to the depth of quarter of an inch, and still falling lightly. The sky is about half covered with clouds of variable character. Crystals numerous and beautiful, chiefly acicular and hexagonal. Figs. 5, 6, 7, 8, 9, were sketched between nine and eleven o'clock, together with other allied forms, which have been previously observed and published by Dr. Nettis and Captain Scoresby; and several, which since have been recorded under this date, by Mr. Glaisher of the Royal Observatory.*

The crystals figured by Dr. Nettis, (observed at Middleburg during the severe winter of 1740,) are published in the Philosophical Transactions for 1775; those by

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