Meteorological Observationsjbr November 1828. 79 



the induction of a piercing gale from the East. This change was so sud- 

 den, as to cause a difference of eighteen degrees in the maximum tempera- 

 ture of the external air between the 7th and 8th. 



On the 8th the thermometer only rose to 38 degrees; but on the 21st 

 and 28th it rose to 60 degrees. The difference in the minimum tempera- 

 ture of the nights of the Ilth and 27th is still greater. 



The sudden disleafing of the tiees after the frosts and two or three heavy 

 dews was very remarkable; the moral of which has been generally applied 

 to November by the poet, thus: 



" Nocturnal dews, caused by the absent suh, 

 And hoary frosts have sometime since begun 

 To shower down the fading leaves, which lie 

 Upon recipient earth, and quickly die — 

 An emblem of the finite end of man." 

 The mean temperature of the external air this month is 2^ degrees 

 higher than the mean of November for many years past. If there be any 

 truth in the supposition of some writers on Cometary Astronomy, that the 

 humid atmospheres of comets extend to, in the course of their revolution 

 and purify the noxious gases in the atmospheres of the planets ; and also' 

 promote m them an additional heat on approaching their perihelion —the 

 uncommon mildness of the air since the 12th instant, in a great measure 

 verifies it, by the presence of Encke's comet. 



The atmospheric and meteoric pha;nomena that have come within our 

 observations this month, are two parhelia, two solar and five lunar halos 

 seventeen meteors, one rainbow; and seven gales of wind; namely, two' 

 trom the East, one from the South-east, one from the South, and three 

 from the South-west. 



REMARKS. 



_ ionrfon.— November 1. Cloudy. 2. Very fine. 3. Foggy in the morn- 

 ing and at night : fine. 4. Thick fog in morning : very fine. 5. Cloudy ■ 

 foggy at night. 6. Fine morning : cloudy. 7. Cold and cloudy. 8. Cold* 

 and cloudy : stormy at night. 9. Fine. 10. Slight fog in morning : cloudy. 

 1 1. Dense fog all day. 12. Dense fog, so much so at night that the mails 

 were upwards of an hour behind their usual time of passing through Turn- 

 ham Green, and were obliged to be conducted by torches. 13 Foff^v 

 morning: fine. 14. Rainy. 15. Cloudy.with showers. 16. Rainy. 17. Cloudy 

 mormng:fin_e. 18— SO. Fine. 21. Very fine. 22. Cloudy. 23— 25. Slicrht 

 tog in mornings: fine. 20. Drizzly: stormy and wet at night. 27. F?ne 

 morning : cloudy. 28. Very fine. 29. Cloudy morning : fine. 30. Fine. 



Penzance. — Nov. 1. Fair : clear. 2-5. Fair. 6, 7. Rain. 8. Rain : 

 tair. 9-11. Clear. 12, 13. Showers. 14. Showers : heavy gale. le 

 Showers. 17. Fair. 18. Fair: rain. 19. Clear : fair. 20, 21. Fair. 

 22. Misty. 23. Clear. 24. Fair : showers. 25, Misty. 26, Rain. 27.28, 

 Clear, 29. Misty, so. Fair, 



Boston. — No\. 1, 2, Cloudy, 3—5, Fine. 6, Cloudy, 7. Fine. 

 8. Stormy. 9. Rain. 10, 11. Foggy. 12, 13. Fine. 14— 17. Cloudy. 

 18. I'ine. 19, 20. Cloudy. 21, Fine. 22. Cloudy, 23—25. Fine. 

 26. Cloudy. 27—29. Fine. 30, Cloudy. 



Meteor 0- 



