468 Meteorological Observations for April 18 l 2S. 



Scale of the prevailing Winds. 

 N. N.E. E. S.E. S. S.W. W. N.W. Days. 

 1 5 5* li 10 3* 3£ 30 



General Observations. — The first five days of this month were dry and 

 cold; afterwards it rained more or less every day till the 26th : but the last 

 four days were dry and warm, in which more progress appeared to have 

 been made in the blooming and growth of fruit and vegetation, than during 

 the preceding fortnight. 



The North-east and North-west winds on several days were blighty, the 

 effects of which may k be traced in the formation of the young wall-fruit, &c. 

 The 4th and 22nd were very cold days, whose maximum temperature in 

 the shade was only 46 and 47 degrees, which is three or four degrees 

 colder than some of the nights. The first swallow appeared here in the 

 morning of the 21st, and the nightingale was first heard on the 11th 

 instant. 



At noon of the 27th three winds prevailed in different directions : the 

 first next the earth, as pointed out by a vane, was from South-east ; the next, 

 which was ascertained by keeping the eye in a line with a fixed object 

 whose bearing on the horizon was known, and observing the motion of the 

 passing cumulus clouds directly from the same point, was from South-west 

 by South ; and the upper one, ascertained in the same way by observing the 

 direction of plumose cirri, was from North North-west. 



The planet Venus, which has now the appearance of a half-moon, was 

 conspicuous with the naked eye at the same time ; and its apparent distance 

 from the Sun's centre, as measured by a sextant, was 44° 8', which is only 

 a few minutes of a degree less than it will be at its greatest elongation on 

 the 19th of next May. 



The mean temperature of the external air this month is 1^ degree higher 

 than the mean of April for the last twelve years. 



The atmospheric and meteoric phenomena that have come within our 

 observations this month, are four solar and two lunar halos, one rainbow, 

 one meteor, and eight gales of wind, or days on which they have prevailed ; 

 namely, one from the South-east, two from the South, four from the South- 

 west, and one from the North-west. 



REMARKS. 



London.— April 1, 2. Fine. 3, 4. Clear and cold. 5. Cloudy, with rain 

 at night. 6. Cloudy. 7. Rain in morning: fine. 8. Fine. 9. Drizzly: 

 fine. 10. Drizzly: very fine. 11. Fine: rain at night. 12. Showery. 

 13. Stormy, but fair. 14. Very fine: rain at night. 15. Wet morning: 

 showery. 16. Cloudy: with showers. 17, 18. Wet. 19,20. Cloudy. 



21. Cold and showery. 22. Showery. 23. Fine: stormy and wet at night. 



24. Very fine. 25. Fine : stormy and wet at night. 26. Clear and fine. 

 27 — 30. Very fine. 



Boston. — April 1, 2. Fine. 3 — 5. Cloudy. 6. Rain. 7, 8. Cloudy. 

 9- Fine. 10. Cloudy. 11. Fine. 12. Cloudy. 13, 14. Fine. 15. Rain. 



16. Fine. 17—20. Cloudy. 21. Rain. 22, 23. Cloudy. 24. Fine. 



25. Cloudy. 26—30. Fine. 



Penzance. — April 1. Clear: fair: heavy rain at night. ,2, 3. Fair. 

 4. Clear: fair. 5. Clear: a shower. 6, 7. Clear : showers. 8. Rain. 

 9. Fair : showers. 10. Hail-showers : fair. 11. Rain. 12. Rain : showers. 

 13. Showers. 14. Fair: clear. 1 5. Rain : clear. 16. Clear: showers. 



1 7. Showers. 18. Rain : clear. 19. Clear : showers. 20, 21. Fair: showers. 



22. Fair. 23. Clear: rain. 24. Misty: rain. 25. Rain. 26. Clear: fair. 

 27—so. Fair : clear. — Rain-gauge ground level. 



Metcoro- 



