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Meteorological Observations.

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Cloudy
Very fine 563

43 Very fine Cloudy 52

41 Foggy Fine 503

44 Rain Cloudy

483

45 Rain Fog, rain. 519 Fine

41 Cloudy 50 Foggy

42 Very fine 56 Showery

}} 48 Showery 56

45 Showery Showery 515

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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.

ARTICLE XV.

METEOROLOGICAL TABLE,

1818.

BAROMETER. TAEKMOMÉTER.

Hygr. at
Wind. | Max. Min. | Med. Max. Min. Med.

9 a, m, Rain.

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20)

C

líth Mon.
Nov. 21 S E 29-70 29.67 29.685 40 37

38.5
22 E 29.72 2947 29-595 50 34 42:0
23 S

29.70 2947 29°585/ 54 43 4805
24 S 29 70

30-05 29.70 29.875 46 30 38.0
25
S 30 14 30-05 30-095 50 32

410
26S W 30-32 30•10 30·210 54 48 51.0
27 SW 30 40 30•32 30•360 54 48 51.0
28 S W 30•38 30•30 30:340 57

48 52:5 29 30 30 30 20 30.250 58 46 51.0

30 S 30.20 30.03 30*115) 57 46 52:5
12th Mon.
Dec. 1S W 30.0329.88 29.955 46 42 44.0

2 N 30.00 29.60 29.800 48 36 42:0
3 S W29•60 29.45 29.525 49 | 35 42:0
4 S W29:42 29:37 29395 47 40 43.5
5 SE 29.5729-4229-495 51 33

42:0
6S E 29.58 29 27 29 495 51 40 46•0
7 SW 29•65 29.27 29460 54 44 47.0

E 30.00 29.65 29.825 54 36 | 500 9N E 30.1030:00 30.050 46

39.0 10N E 30 13 30.08 30-105 45 32

38.5 11N E 30:14 30.08/30•110 43 36:5 12N W 30•12 30.07 30:095 42 37

39.5 13N E 30:18 30 10 30-140 41 31

36•0 14N E 30•20 30:15 30:175 43 33

38.0 15 N E 30-1529.96 30 055 40 23 31.5 16N W 30:17 30.00 30.085 32 16 24.0 17 N W 30•12 29.82 29.970 28 18 23:0 18 Var. 30:00 29 70 29.850 39 25 32.0 19 SW 30·25 30:00 30.125 43 29 36.0 20S W30·10 29.90 30.00047 43 400

8 S

301 10 401

32

30

64 71 100 76 74 77 81 88 76 88 71 80 69 87 78 78 79 84 86 73

2

13

1)

30 40 29 27 29 925 58

16 41:20

79 ! 1.75

The observations in each line of the table apply to a period of twenty-four boors, beginning at 9 A. M. on the day indicated in the first column. A dasha 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 Nimõus, a. n.: Cumulus beneath Cirrostratus: little wind. 23. Wet, gloomy, 2. p.: fair, p. m.: at sub-set, rose-coloured Cirri, with orange in the twilight. 94. Foggy morning: the dew frozen in the grass: the rane at SW. 25. A very deose Cirrostratus, a. n. forming a mist, which did not reach to the tops of the trees : a solar halo at ll: 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, caln. 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 nuch wind: cloudy. 4. Fair, windy, cloudy. 7. A drizzling rain through the day. 6. Hoar frost. 8. Showery, a. n. 9. Wet. 10—20. Chiefly fair and cloudy: at intervals, fine, with the wind moderate: very wbite 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 lanar balo occurred more than once; but the dates were not noted.

RESULTS.

Winds Variable.

30-40 inches.
29.27
29.925

Barometer : Greatest height.

Least

Mean of the period...
Thermometer : Greatest height...

Least. ....

Mean of the period..
Mean of the Hygrometer...
Evaporation....

580 16 41.20

79

0.35 inches.

Rain

....... 1.75 inches.

The few nocturval 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, bave put a seasonable stop to vegetation. The temperature of the latter half of the period, and the hygro. meter 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. Ingenhouszi

By Thomas Thomson, M.Þ. ¥.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. N° II.

F

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