Images de page
PDF
ePub
[merged small][graphic][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][ocr errors][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][ocr errors][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][merged small][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed]
[merged small][merged small][merged small][graphic][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][ocr errors][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][ocr errors][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][ocr errors][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed]

Rain, by the pluviameter, between noon the 1st of Nov. and noon the 1st of Dec. 2-412 inches. Evaporation, during the same period, 1.08 inches.

[blocks in formation]

1818. Wind. Max.) Min. Med. Max. Min. | Med.

Hygr. at

9 a. m. Rain.

[merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small]

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.

Eleventh Month.-21. Fair: cloudy, with a strong breeze. 22. Cirri tending to Nimbus, a. m.: Cumulus beneath Cirrostratus: little wind. 23. Wet, gloomy, a. m.: fair, p. m.: at sun-set, rose-coloured Cirri, with orange in the twilight. 24. Foggy morning: the dew frozen in the grass: the vane at SW. 25. A very dense Cirrostratus, a. m. forming a mist, which did not reach to the tops of the trees: a solar halo at 11: more clear in the evening: rain in the night: the wind SW to SE. 26. Wet, windy morning: fair and cloudy, p.m. and night, 27, 28. Cloudy. 29. Gloomy, fair, calm. 30. A breeze, with light clouds: fine, p. m. with Cumuli.

Twelfth Month.-1. Rain in the night. 2. The vane at N, a. m. but in the night the wind came to SW, blowing fresh, with a little rain. 3. Vane at S in the morning, with much wind: cloudy. 4. Fair, windy, cloudy. 7. A drizzling rain through the day. 6. Hoar frost. 8. Showery, a. m. 9. Wet. 10-20. Chiefly fair and cloudy: at intervals, fine, with the wind moderate: very white hoar frost on some of the latter mornings, with rime to the tops of the trees. Large lunar corona were frequent in the evenings, and lunar halo occurred more than once; but the dates were not noted.

[blocks in formation]

The few nocturnal frosts that occurred in the present season up to the middle of the month were so slight as to permit the Nasturtiums (the tenderest of our autumnal garden flowers) to continue to vegetate: other indications of the mildness of the season were equally striking. I observed a horse-chesnut with tufts of new leaves and blossoms put forth from the ends of the branches all over the tree; but the severe nights, and some frost by day, since the 15th, have put a seasonable stop to vegetation. The temperature of the latter half of the period, and the hygrometer throughout, were noted at the laboratory.

TOTTENHAM, Twelfth Month, 22, 1818.

L. HOWARD.

ANNALS

OF

PHILOSOPHY.

FEBRUARY, 1819.

ARTICLE I.

Short Account of the Scientific Writings of Dr. Ingenhousz: By Thomas Thomson, M.D. F.R.S.

IN volume x, p. 161, of the Annals of Philosophy, there is inserted a biographical account of Dr. Ingenhousz, in which Dr. Garthshore, the writer of the article, has given a short account. of the writings of this ingenious philosopher. Probably the readers of the Annals will not be displeased if I take a short review of such of Dr. Ingenhousz's papers as I have had an opportunity of reading, and endeavour to point out the particular scientific discoveries, or improvements, for which we are indebted to him.

1. His first paper on the torpedo was published in the Philosophical Transactions for 1775. It merely informs us that being in Leghorn in December, 1772, he went out 20 miles to sea, and caught a number of torpedoes. He verified the power which this fish has of giving electric shocks. These shocks he found very weak, which is usually the case in winter, and they could not be communicated through a chain of metal.

It was in 1773 that Mr. Walsh made his celebrated observations and experiments on torpedoes. These experiments had been published before Dr. Ingenhousz's paper, and of course had anticipated all the facts contained in it. But it would appear from a comparison of dates, that Dr. Ingenhousz's experiments were made at least as early, if not earlier, than those of Mr. Walsh. The subsequent experiments of Mr. Cavendish, and the comparison of the electrical organs of the torpedo with those of the voltaic battery, have thrown much additional light on the VOL. XIII. No II.

F

[ocr errors]
« PrécédentContinuer »