Meteorological Observations at Ludgvan in Mount's-Bay, Cornwall, 1770: By William Borlase, D. D. F. R. S. Communicated by Dr. Jeremiah Milles, Dean of Exeter, and F. R. S.

XXIII. Meteorological Observations at Ludgvan in Mount’s-Bay, Cornwall, 1770: By William Borlase, D.D. F.R.S. Communicated by Dr. Jeremiah Milles, Dean of Exeter, and F.R.S. | Month | Barometer | State of the Weather and Wind | Fahrenheit’s Thermom. | Ombr. | |-------|-----------|------------------------------|----------------------|-------| | January | Highest 28 30,51 | Snow from the 5th to the 9th; 10th, snow all gone. Violent storm on the 11th; nine days calm; rest misty, with fogs, showers, and wind. East and West winds nearly equal, latter rather more; hard frost on the 7th day only. | Highest 2 51 | Med. Inches. | | | Very high | | Lowest 7 32 } 43\(\frac{1}{3}\) | 3\(\frac{1}{6}\) | | | Lowest 7 29,36 | | | | | February | Highest 14 30,39 | Calm 12 days; a violent storm all night the 18th; a slight frost only on the 24th; wind Westerly 21 days. | Highest 14 51 | Lowest 24 36 } 44\(\frac{3}{8}\) | 3,300 | | | Lowest 18 29,1 | | | | | March | Highest 2 30,6 | Sleet, deep snow and lying, the 16th, 17th, 18th, 19th, 20th, with hard frost; frost, and hard snowing and windy, 23d, 24th; snow, hail, and frost, 26th, 27th, 28th, 29th. Frost and snow gone the 30th, with hazy mists. Wind mostly from the North and East, being to the West as 19 to 12. | Highest 31 5\(\frac{1}{2}\) | Lowest 21 32 } 41\(\frac{5}{8}\) | 4,040 | | | Lowest 10 28,71 | | | | | April | Highest 29 30,31 | Mixture of all weathers, but that of frost and snow we had none. Wind 22 days from the North; rest nearly equal. | Highest 30 54 | Lowest 9 39 } 46 | 3,400 | | | Lowest 6 28,90 | | | | May | Month | Barometer | State of the Weather and Wind | Fahrenheit's Thermom. | Ombr. | |-------|-----------|------------------------------|----------------------|-------| | May | Highest 1 29.98 | First 7 days windy and stormy showers; in the rest 20 days of calm, mostly fair. Wind 16 days from the East equally mixed with North and South. | Highest 28 60 | Med. Inches. | | | Lowest 5 28.99 | | Lowest 3 40½ | 52 ⅓ | 3,000 | | June | Highest 14 30.7 | Mostly hazy and misty. Fair, windy, rain and cloudy, nearly equal. Wind 26 days from the West, chiefly mixed with the South. | Highest 9 61 | Lowest 20 49 | 54 ⅔ | 3,200 | | | Lowest 19 29.17 | | | | | | July | Highest 12 30.20 | Calm 24 days, some hazy and misty, but little or no rain. Wind Westerly 22 days, its mixture mostly with the South. | Highest 13 66 | Lowest 4 52 | 58 ⅔ | 1,950 | | | Lowest 18 29.32 | | | | | | August| Highest 4 30.10 | 18 calm days; rest misty, hazy, or fair. On the 6th at 8 P.M. much lightning; violent about a quarter past 9, with very rapid flashes, and loud thunder, till two A.M., when it began to rain with a violent flood for a quarter of an hour; afterwards, much rain, but no more thunder or lightning. Wednesday the 8th, close calm morning; about five A.M. thunder, with much lightning; about six rained violently, at nine cleared off, and a fair day. Thursday morning the 9th, 2 A.M. lightning and thunder, but not so violent; wind Easterly; wind East and West nearly equal, with North and South nearly equal. | Highest 6 71 | Lowest 31 55 | 60 ⅓ | 1,850 | | | Lowest 20 29.62 | | | | | | September | Highest 28 30.10 | Weather mostly variable, and of all kinds. On the 18th hazy and calm, A.M.; P.M. a storm and hard rain; on the 25th and 26th a continued storm to the 27th; the 28th calm with mists; wind twenty-five days South, with a greater mixture of the West. | Highest 6 63 | Lowest 22 53 | 58 ⅔ | 2,840 | October | Month | Barometer | State of the Weather and Wind | Fahrenheit's Thermom. | Ombr. | |-----------|--------------------|-----------------------------------------------------------------------------------------------|-----------------------|-------| | October | Highest 7 30,24 | First eleven days calm and mild; next twelve days violent rains and windy; next eight days showery, and rains. Wind twenty-five days Westerly, with eighteen days mixture of the North; rest equal. | Highest 1 60 | Med. | | | Lowest 22 28,69 | | Lowest 22 43 | | | November | Highest 4 29,94 | Rain twenty-two days; rest stormy, windy, and cloudy. Wind Westerly twenty-six days; mixed mostly with the South. An extraordinary fall of rain this month; on the 25th a storm all night. | Highest 3 53 | | | | Lowest 8 28 44 | | Lowest 20 37 | | | December | Highest 1 30,0 | 26 days rain and showers; much stormy weather. On the 18th in the evening, began a violent storm from West, and W. S. W.; the extreme was at eleven P. M. Wind twenty-six days blew from the West; mostly mixed with the South. | Highest 15 52 | | | | Lowest 23 29,20 | | Lowest 25 37 | | Total Rain this Year 1770, at least 44,100 inches. XXIV. Description