Meteorological Observations. 71 



by extracting the alkalies. The author believes that the sulphur 

 met with also in these and similar localities only makes its appear- 

 ance when the rock is not porous. The water containing an alka- 

 line sulphuret, agitated in contact with the air, deposits sulphur. 



The comparison of these facts with those observed by C. Deville 

 on the rocks forming the soufriere of Guadaloupe, will show the 

 complete concordance which exists between the phsenomena pre- 

 sented in the neighbourhood of volcanos and those produced near 

 suljjhurous thermal springs. In the Pyrenees, where these waters 

 are so abundant, earthquakes were formerly very frequent, and the 

 masses of water which pour constantly from the earth serve, so to 

 speak, as safety-valves for the prevention of greater convulsions. — 

 Comptes Rendus, August 8, 1853, p. 234. 



METEOROLOGICAL OBSERVATIONS FOR NOV. 1853. 



Chiswick. — November 1. Cloudy and fine. 2. Very fine. 3. Foggy. 4. Very 

 fine : overcast. 5. Uniform haze : clear at night. 6. Rain : foggy : uniformly 

 overcast. 7. Foggy: overcast. 8. Foggy : fine : clear. 9. Clear and fine. 10. 

 Frosty : fine : foggy. 11. Dense fog : clear at night. 12. Overcast. 13. Foggy : 

 densely overcast. 1 4. Foggy : overcast. 15. Dense fog : rain at night. 16. Fine. 

 17. Frosty : fine. 18. Sharp frost : very fine. 19. Frosty: fine : clear and frosty. 

 20. Overcast : rain : clear and frosty. 21. Frosty: clear. 22. Foggy. 23. Dense 

 fog. 24. Overcast : rain. 25. Hazy and dull : rain. 26. Overcast. 27. Fine. 

 28. Overcast throughout. 29. Densely overcast : rain. 30. Hazy : slight rain. 



Mean temperatiu-e of the month 40°-14 



Mean temperature of November 1852 47 "38 



Mean temperature of Nov. for the last twenty-seven years . 43 "18 

 Average amount of rain in Nov 2*38 inches, 



Boston. — Nov. 1 — 4. Fine. 5. Cloudy. 6. Cloudy: rain a.m. 7. Cloudy. 

 8 — 12. Fine. 13. Fine : rain p.m. 14. Fine. 15. Foggy : rain p.m. 16. Rain: 

 rain a.m. 17—19. Fine. 20. Rain: rain a.m. 21, 22. Fine. 23. Cloudy. 

 24, 25. Cloudy: rain p.m. 26. Rain: rain a.m. 27. Cloudy. 28. Cloudy: 

 rain p.m. 29. Cloudy : rain a.m. and p.m. 30. Cloudy : rain a.m. 



Sandwich Manse, Orkney. — Nov. 1. Cloudy a.m. : rain p.m. 2. Cloudy a.m. : clear 

 p.m. 3. Clear.fine a.m. : clear p.m. 4. Damp a.m. and p.m. 5. Cloudy a.m. and p.m. 

 6. Rain a.m. : clear, fine p.m. 7. Drizzle, showers a.m. : clear p.m. 8. Rain a.m. : 

 bail-showers, lightning p.m. 9. Cloudy a.m.: damp p.m. 10. Cloudy a.m.: 

 showers p.m. 11. Sleet-showers a.m.: showers p.m. 12. Bright a.m.: clear, 

 fine p.m. 13. Cloudy a m. : clear, fine p.m. 14. Cloudy, frost a.m. : damp p.m. 

 15. Clear, frost a.m. and p.m. 16. Cloudy, frost a.m. : clear, frost p.m. 17. Clear, 

 frost A.M. and p.m. 18. Showers a.m. : cloudy p.m. 19. Cloudy a.m.: rain, 

 cloudy p.m. 20. Clear, fine a.m. : sleet-showers p.m. 21. Clear, fine a.m. : clear 

 p.m. 22. Bright a.m.: clear, aurora S. p.m. 23. Bright a.m.: clear p.m. 24. Cloudy 

 A.M. and p.m. 25. Bright a.m. : rain p.m. 26. Clear, frost a.m. : clear, aurora 

 P.M. 27. Clear, frost a.m. : rain p.m. 28. Clear a.m. : clear, aurora p.m. 29. Rain 

 A.M. : clear, aurora p.m. 30. Bright a.m. : clear, aurora p.m. 



Mean temperature of Nov. fortwenty-six previous years 42''-59 



Mean temperature of tliis month 44 '87 



Mean temperature of Nov. 1852 41 -52 



Average quantity of rain in Nov. for thirteen previous years . 4-38 inches. 



