466 Meteorological Observations for April 1830. 



General Observations.— This month has been alternately fine and showery, 

 with frequent gales of wind ; and although the cold nigiits, with hoar frost 

 in the first part, gave a check to vegetation, the warm rains, followed by 

 clear sunny days in the latter part, caused a rapid growth. 



After a fruitful year and a severe winter. Nature has spread out her gifts 

 more profusely in the bloora of the trees than could be expected : in 

 sheltered situations the blooming and the formation of the fruits have 

 prospered; but in open situations in the countrj' they have been much 

 blighted by the cold winds and prevailing frosts; nor have the easterly 

 winds been pure and favourable to the human constitution. 



On the 1st instant we had a snow-storm from 6 till nearly 10 A.M., which 

 covered Portsdowu Hill, although it was mixed with heavy rain. In the 

 neighbourhood of London the snow is said to have been four inches deep, 

 and in Shropshire six inches deep at the beginning of the month. The 

 sudden change of temperature which brought on the snow at this late 

 period, was occasioned by opposite winds from S.W. and N.E., and the 

 cold increased till the morning of the 5th, when the moats of the fortifi- 

 cations were frozen over. 



In the afternoon of the 8th, vivid flashes of lightning emanated from 

 black clouds from the S.E., accompanied with loud claps of thunder. In 

 the morning of the 18th, the first pair of swallows made their appearance 

 here. 



The mean temperature of the external air this month is about equal 

 to the mean of April for many years past. 



The atmospheric and meteoric phasnomena that have come within our 

 observations this month, are five parhelia, four paraselenae, one lunar and 

 three solar halos, one rainbow, four meteors, an aurora borealis, and twelve 

 gales of wind, or days on which they have prevailed, namely, two from the 

 North-east, one from the East, seven from the South-west, and two from 

 the North-west, 



REMARKS. 



London. — April 1, 2. Stormy and wet. 3. Cold and stormy. 4, 5. Clear 

 and cold, with sharp frost at night. 6, 7. Fine. 8. Very fine, with much 

 lightning at night. 9. Very fine: showery. 10 — 12. Showery. IS. Fine. 

 14. Very fine. 15 — 17. Cloudy, with showers. 18. Very fine. 19. Showery, 

 with thunder at noon. 20. Showery. 21. Stormy, with strong gale at 

 nioht. 22, 23. Stormy, with rain and boisterous gale. 24, Stormy morn- 

 ing: fine. 25 — 30. Very fine. 



Penzance. — April 1, 2. Rain. 3. Hail, rain, snow. 4. Fair. 5, 6. Clear. 

 7. Misty: rain. 8.Fair:rain. 9. Fair: showers. 10. Showers. 11. Clear; 

 rain. 12. Fair. 13. Clear. 14. Fair: rain. 15. Rain. 1 6. Rain : fair. 

 17. Fair. 18. Clear. 19 — 20. Fair. 21, 22. Fair: rain. 23. Fair : showers. 

 24— 26. Clear. 27. Fair. 28. Clear. 29. Clear: shower, 30. Clear: 

 fair. 



Boston. — April 1. Cloudy. 2. Snow: snow p.m. 3. Snow: snow great part 

 of the day. 4. Fine: frost early a.m. 5,6. Fine. 7. Cloudy. 8, 9. Fine. 

 10. Rain. 11. Cloudy. 12. Cloudy: rain early a.m. 13, 14. Cloudy. 

 16. Rain. 16. Fine: rain early a.m. 17. Cloudy. 18. Cloudy: rain early 

 A.M. 1 9. Rain : beautiful rainbow 6 p.m. 20. Rain : about noon very 

 stormy. 21, Rain. 22. Windy: rain p.m. 23. Cloudy. 24. Stormy: rain 

 early A.M. and P.M. 25, Fine. 26. Cloudy. 27— 30. Fine. 



MeteorO' 



