Column Six's contains opposite Noon the greatest degree of heat between the morning and evening observation; and then follows the least degree of heat between the evening and morning observation, and so on.

On the 23d, at four o'clock, P. M. thunder was heard in the south-east.

1817. Wind. Max. Min. Med. Max. Min. | Med.

Hygr. at

9 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.

Fifth Month.-8. Cirrocumulus, mixed with Nimbi, a.m. after which, the cloudiness becoming general, a thunder-storm ensued, soon after four, p.m.: it came from the SW, with the wind at SE. 9. Cold wind, a. m. with a general cloudiness. 10. Overcast, a.m. with Cumulostratus: a few drops of rain. 11. Cumulus, Cumulostratus, and Nimbus: the wind NW and SW: rain with wind at night from the southward. 12, a. m. A westerly gale. 13. Showery, with hail twice. 14. Showery: hail, pretty large, at noon from the southward. 15, 16. Fair. 17. A shower, p.m.-Travelling in the interval from the 13th to the 17th inclusive as far as Leeds, in Yorkshire, and home again, I found cloudiness from large Cumuli, &c. general, but met with very little rain. On the 15th, passing between Leeds and Pontefract, there was a fine display of Nimbi, one of which let fall a heavy shower on the latter place and its environs. On the 17th, after a deep orange tint in the morning twilight, the sun rose red behind a Cirrostratus; in emerging from which the brilliant part of the disc was divided by a well-defined line from the lower and coloured portion.-18. Cloudy, a. m.: gentle rain, p. m. 19. Windy, cloudy, a. m.: wet, p. m. 20, 21. Rainy. 22. Cloudy. 23, 24. Some showers: a Stratus at nine, p.m. the latter day. 25. Thunder at a distance: showers, a. m. 27. A thick fog at night, undoubtedly from a Stratus.

RESULTS.

Winds variable, but for the most part westerly.

Barometer: Greatest height.

29.99 inches

I had anticipated a third dry period, similar to the two we had experienced, and expected that the rains would return after the summer solstice: in this I have been happily mistaken. In the beginning of the present period the weather took a new type with us, the westerly current coming in again, with some discharges of electricity, bringing rain, which gradually became more plentiful, and proved exceedingly seasonable. Vegetation has passed, in consequence, from a starved and backward state, to one of considerable luxuriance and promise. It is observable that the barometer during this period has scarcely passed the boundary of 30 in. in elevation, and has certainly not descended below 29 in. The mean temperature, though 6o higher than that of the period immediately preceding, is low for the season,

TOTTENHAM,

Sixth Month, 17, 1817.

L. HOWARD.

ANNALS

OF

PHILOSOPHY.

AUGUST, 1817.

ARTICLE I.

Biographical Account of M. Rochon.

ON April 7, 1817, was buried M. Rochon (Alexis-Marie), Member of the Royal Academy of Sciences. After the funeral service, M. Girard, Member of the Academy, delivered the following discourse:

"GENTLEMEN,

"Till a more worthy honour be paid to the memory of our fellow-associate, whom we deposite this day in the tomb, I hope I may be permitted to raise my voice for a few moments to call to your recollection his labours and his services. May the expression of our regret bring some consolation to the melancholy duty which we have just discharged!

"M. Rochon was born at Brest on Feb. 21, 1741. This harbour, and the vessels with which it was filled, were the first objects that struck his attention. Surrounded from his youth with sailors and voyagers, their conversation decided his taste, and the progress of naval science became the special object of the whole labours of his life.

"He was named Correspondent of the Academy of Sciences in 1765. To this title he soon added that of Astronomer to the Navy, and in this quality he made a voyage to Morocco in 1767. Immediately after his return he set out for the East Indies in a vessel commanded by M. de Tromelin, his relation and friend. He determined in 1769 the position of the islands and rocks situated beVOL. X. N° II.

F