Meteorological Observations foi' March 1830. 399 



On the 16tb, 17th and 18th, the equinoctial gales blew fresh from the 

 Westward. In the evening of the 19th, at sunset, the clouds ciry-i, cii-ro- 

 cumidi, and cirrostrati passed through a gradation of prismatic colours, par- 

 ticularly the last modification. 



The mean temperature of the air this month is one degree above the 

 average of March for many years past : and a high atmospheric pressure has 

 prevailed during the last fortnight. 



Spring water was brought to its minimum temperature for this year so 

 early as the 20th of February, and remained stationary till the middle of 

 March, when it began to increase. 



The atmospheric and meteoric phaenomena that have come within our 

 observations this month, are, three solar and three lunar halos; six meteors; 

 and four gales of wind, namely, three from the South-west, and one from 

 the West. 



A very low ehbiyig of the Tide at Portsviouth, March llih, 1830. — On the 

 information of an active Portsmouth pilot, and others interested in the 

 unusually low ebbing of the tide this morning, it was found at least six feet 

 lower at Hamilton's Bank on the western side, and near the mouth of 

 Portsmouth harbour, than they ever saw it before at the same age of the 

 moon. Thirty years ago it is said to have been about as low. 



The Bank on this occasion was completely dry for 160 feet, and on which 

 a few hours before vessels of large tonnage passed over, persons were seen 

 walking. His Majesty's ship Victory grounded in Portsmouth harbour ; and 

 the wreck of the old Boyne, which blew up about thirty-five years ago near 

 Southsea Castle, made its appearance above water. This singular phaeno- 

 menon in the reflux or ebbing of the tide, scarcely three days after the 

 new moon, may probably turn out a prognostic of some distant convulsion 

 of natm-e. 



REMARKS, 



London. — March 1. Cloudy: fine. 2 — 5. Very fine. 6. Slight fog: 

 very fine. 7, 8. Very fine. 9. Drizzly. 10. Cloudy morning: very fine. 

 11. Very fine. 12. Very fine: stormy at night. 13. Clear, with stormy 

 wind. 14. Very fine. 15. Stormy, with showers. 16. Stormy, with 

 slight hail-showers. 17, 18. Fine. 19. Cloudy, with stormy wind. 20. Fine. 

 21. Very fine. 22. Cloudy, with stormy wind. 23. Fine. 24 — 30. Very 

 fine. 31. Fine morning: cloudy, with drizzly rain at night. 



Penzance, — March 1 , 2. Misty. 3. Cle;ir. 4. Clear: rain. 5. Rain: fair. 

 C. Misty: rain. 7. Fair: clear. 8, 9. Uain. 10. Fair: rain. 1 1, 12. Fair. 

 13. Clear. 14. Clear : fair. 15. Fair: showers, hail and rain. 16. 

 Showers. 17—19. Fair. 20. Clear. 21. Fair. 22. Misty: rain. 

 23 — 26. Fair. 27 — 30. Clear. 31. Fair. 



.Bo«<o«.— March 1. Misty. 2, 3. Cloudy. 4— 7. Fine. 8, 9. Cloudy. 

 10. Rain. II, 12. Cloudy. 13. Stormy. 14. Fine. 15. Cloudy and 

 stormy. 16. Stormy. 17. Cloudy. 18. Stormy. 19 — 2:}. Fine. 24,25. 

 Cloudy. 26 — 30. Fine. 31. Rain. 



N.B. This month has been unusually warm and dry. 



Meteoro. 



