ARTICLE XV.

Astronomical, Magnetical, and Meteorological Observations. By Col. Beaufoy, F.R.S.

Bushey Heath, near Stanmore.

Latitude 51° 37′ 42′′ North, Longitude west in time 1' 20'7′′.

Evening Observ.

Hour.

Variation.

Owing to the shortness of the days, evening observation discontinued.

Mean for
Month.

Feb. 25 the wind blew hard, with violent gusts from the westward, and the needle vibrated at intervals 57'. In taking the mean of the observations at noon, that on the 26th is rejected, owing to the variation being so unusually small; for which there was no apparent cause

The quantity of rain between noon Feb. 1, and noon March 1, measured by the pluviameter, was 1.45 inches. The evaporation during the same period was 1.05 inches.

ARTICLE XVI.

METEOROLOGICAL TABLE.

BAROMETER,

THERMOMETER. Hygr. at

1818. Wind. Max. Min. Med. Max. Min. Med.

a. m. Rain.

The observations in each line of the table apply to a period of twenty-four hours, beginning at 9 A. M. on the day indicated in the first column. A dash denotes, that the result is included in the next following observation.

REMARKS.

First Month.-30. Squally: showers, a. m.: wind and rain in the night. Second Month.-1. Hoar frost: rain, followed by snow in large flakes: Cumulostratus and Nimbus. 2. Hoar frost: fine Cirri, with Cirrostratus, a. m.: the lower modifications with some loose snow, p.m. 3. Fair: hoar frost. 4. Cloudy morning snow on the waggons from the north, probably of last night: it seems to be the wind blowing over snow that keeps down our temperature to 32°. 5. A few drops of rain about nine, a. m. : after which very fine, with Cumulus and inosculation. 6. Hoar frost: misty. 7. Hoar frost: the paths icy: mist increases, with a calm air. 8. Misty: rime to the tops of the trees. 9. Misty: the rime falls partially. 10. Misty till evening, when it cleared up, and the rime fell off. 11-15. Hoar frosts, with fine weather: Cumuli, &c: on the 15th a few drops of rain. 16. Very fine, with Cumuli, &c.: at seven, p. m. a large faint lunar halo. 17. Fine, with Cirrocumulus, &c. 18. Windy: wet, p. m. 19. A slight Stratus, a. m. wet evening: windy night. 20. Hoar frost: somewhat misty : rain before noon: some hail in a shower at half-past one: after this Cumulus, with Cirrus and Cirrostratus above: the latter imbricated, or overlapping, like the branches of a pine-tree: then Nimbi amidst groups of other clouds, the lofty crowns of which were long coloured with a fine gradation of red tints about sun-set: the sky around the moon showed violet, while the disc was brassy. 21. Much wind, a. m. with clouds driving high and close: wet, p. m. : at evening a lighter sky, with Cumulus and Cirrocumulus, ending in Cirrostratus, with a lunar corona, 22. Morning cloudy and dark, by a large mass of smoke passing near us in the S.: rain, sleet: snow to the depth of several inches, with a very gentle breeze: moonlight evening. 23. Fair: much snow on the trees and shrubs: a strong westerly breeze: the rise of the barometer, like the previous fall, very sudden : at night stormy, with hail and much rain. 24. The snow mostly gone: elevated Cirri, with Cumuli in a pale blue sky after Cirrostratus and haze at evening, a gale through the night. 25. Much wind, with driving clouds: temperature 480 at nine, a. m. 26. a. m. Rain: snow in very large flakes: sleet: much water out since the late rains: rocky Cumuli, followed by Nimbi and gusts of wind, p. m.: clouds coloured at sun-set. 27. Wet, a. m.: fine evening after a rainbow. 28. Elevated Cirri and Cirrocumuli stretching N. W. and S E.: general obscurity followed, with showers and wind.

:

RESULTS.

Winds variable: in the latter part stormy from the Westward.

The evaporation for this and the preceding period taken together, is 1.38 inch.

TOTTENHAM, Third Month, 26, 1818.

L. HOWARD.